Detergente Vetri di Dr. Wack "CW1:100"

Dr. Wack CW1:100 Windshield Cleaner: Streak-Free Vision

What is the CW1:100 windshield cleaner from Dr. Wack? A highly concentrated wiper fluid system from Ingolstadt that loosens insect residue and reduces streaks. Four variants—from BIO to Classic, Super, and Ready-Mix—cover every budget and packaging preference.

Windshield cleaner from Dr. Wack CW1:100 is the concentrate line for wiper fluid that you mix with water at a ratio of up to 1:100 and pour into the reservoir. These cleaners loosen insect residue, road film, and greasy haze so that the wipers can clear them away streak-free. The name CW1:100 stands for exactly this yield: one part concentrate to up to one hundred parts water.

• Up to 1:100 yield with the concentrate. From 250 ml of Super or Classic, you can mix over 25 liters of ready-to-use wiper fluid. A small bottle in the trunk thus replaces several pre-mixed canisters and lasts for an entire season.
• Four variants for four needs. BIO, Classic, Super, and Ready-Mix cover the range from a 25 ml trial bottle to a 5-liter bulk container. If you don't want to mix, just grab the ready-to-use 2.8-liter Fertig-Mix.
• Insect film loosened in under 60 seconds. The cleaners are designed to dissolve organic residue. You spray via the nozzles, let the wipers run two to three times, and the windshield is clear again—no stopping, no rags required.

Pro-tip from Detailing1: We often see wiper fluid reservoirs filled with pure concentrate because someone missed the mixing instructions. This causes streaks, foams up in the pump, and wastes cleaner. Always mix in a bucket or directly in an empty canister first, then pour it in. In midsummer, a weaker ratio of 1:100 is sufficient, but during peak insect season or heavy pollen, you can increase it to 1:50.

Why a concentrate performs better than ready-mixed windshield fluid

A windshield cleaner as a concentrate is the highly condensed core of what works in wiper fluid: surfactants that loosen grease and insect protein, plus components against streaks and glare. You aren't paying for transported water.

The CW1:100 line from Dr. Wack is consistently built on this logic. A 250 ml bottle of Super or Classic yields over 25 liters of ready-to-use wiper fluid at a 1:100 ratio. That is the practical advantage over ready-mixed fluid in a 5-liter canister: less storage space, lower weight in the trunk, and you can dose according to the season—weaker in summer, stronger during insect season.

The brand name carries the yield in the title. CW1:100 stands for one part cleaner to up to one hundred parts water. This number is not marketing; it is the upper dilution limit where cleaning performance is still effective. If you need more power against stubborn film, drop down to 1:50 or 1:25 and use the same bottle for a shorter or longer time, depending on the season.

An often underestimated point is mixing reliability. If you dose a concentrate, you retain control over the result. If the windshield is full of dried-on mosquitoes in the morning, you can mix a stronger batch that day. If there is only a light film of dust, the weaker dilution suffices, and the bottle lasts longer. Ready-mixed products take this control away from you and force you into a fixed strength, regardless of how dirty the glass is.

Dr. Wack is based in Ingolstadt and manufactures its cleaners in Germany. The brand considers windshield care a dedicated discipline alongside auto, motorcycle, and rim care, rather than treating it as a side product. That is precisely why there are four variants rather than one universal solution that only does everything halfway. The formulas are stable over years, which makes the brand predictable: what worked last year works just as well this year.

An overview of the four variants in the CW1:100 line

Four products, four clear tasks. Every windshield cleaner in the line provides clear vision; the difference lies in the yield, raw material base, and whether you want to mix it yourself.

The CW1:100 Super is the workhorse of the line. 250 ml yields over 25 liters of wiper fluid when mixed 1:100, and it is available as a 40 ml trial bottle as well as a 5-liter bulk container. If you refill once per season and want maximum range, this is the choice. The CW1:100 Classic is the balanced variant with the same yield, available from a 25 ml bottle to a 5-liter canister, for those who want a proven standard recipe with no frills.

The CW1:100 BIO relies primarily on renewable raw materials and comes in 250 ml or 40 ml sizes. It is the choice for those who care about the raw material base without sacrificing cleaning performance. If you don't want to mix at all, choose the Super Ready-Mix in the 2.8-liter canister: unscrew, pour, done. Ideal for on the go, for your camper, or as a spare in the shed.

The packaging logic applies throughout the entire line. Small 25 and 40 ml bottles are intended for testing and the glove compartment. The 250 ml standard size covers a typical summer season. The 5-liter concentrate is for high-mileage drivers and multi-vehicle households. And the 2.8-liter Ready-Mix is the only version that requires no mixing. This way, every type of driver finds the right format without having to compromise on the recipe.

Concentrate or Ready-Mix: which type fits you

The first decision isn't the brand, but your habits with your car. Do you like mixing it yourself and planning ahead, or do you just want to refill without having to do the math?

If you want to keep the trunk uncluttered and want to prepare for the entire season once a year, a concentrate like Super or Classic is the clearly better choice. 250 ml weighs little, takes up almost no space, and yields over 25 liters of ready-to-use wiper fluid at a 1:100 ratio. The 5-liter concentrate container is enough for an entire fleet of vehicles or several years of individual use. The material cost per tank filling decreases with every dilution.

If, on the other hand, you rarely think about wiper fluid and just top it off at the gas station, the Ready-Mix saves you the hassle of mixing. The 2.8 liters fit under the passenger seat or in the storage compartment of a camper and are ready to use without preparation. The ready-to-use canister is also a good investment as an emergency reserve for the first cold morning with insect residue from the day before.

A third factor is the question of raw materials. Those who value a primarily renewable base should choose the BIO variant. It cleans in the same area but differs in composition. For many drivers, this is the deciding factor that tips the scale between otherwise equivalent concentrates. Important: BIO refers to the raw material base, not to weaker effectiveness. The ability to loosen insect film remains comparable to the classic recipes.

Calculate your actual needs roughly once, and the decision becomes easier. An average commuter empties their reservoir about every two to three weeks in summer, which adds up to a good 30 to 40 liters of finished wiper fluid over a season. A single 250 ml bottle of concentrate covers this almost completely at a 1:100 ratio. If you are supplying two vehicles or are on the road a lot for work, you will quickly need twice as much and are better off with the 5-liter container. This quick rough estimate prevents you from ending up at the end of the season with half-empty bottles or an constantly empty reservoir.

How to properly refill wiper fluid and avoid streaks

The most common cause of streaks is not a bad product, but improper application. With a few simple steps, your concentrate can produce a streak-free result.

Always mix the concentrate in a clean container first; never pour it pure into the reservoir. For summer, 1:100 is sufficient—about 25 ml of concentrate to 2.5 liters of water. During heavy insect season or sticky pollen film, increase to 1:50. Stir briefly and then pour into the reservoir. This prevents over-dosing, foam in the pump, and the typical milky streaks caused by too much surfactant.

Before the first swipe, spray briefly from both nozzles and let the cleaner soak for five to ten seconds before the wipers run. This gives the surfactants time to loosen dried-on insects instead of just smearing them across the glass. Two to three wipe cycles are usually enough for a clear windshield. With a thick layer, it is better to spray twice in short succession than once for a long time.

Keep the nozzles clear and check in winter if your mixture is frost-resistant. The CW1:100 summer cleaners are not intended as antifreeze. If you drive year-round, combine them in the warmer months and switch to a winter mixture in time before the first freezing temperatures arrive. A half-filled reservoir with pure summer water can damage the pump or hoses in freezing conditions.

One final step makes the difference between clean and truly clean: wipe the wiper blades with a damp cloth from time to time. A dirty blade will pull a fine smeary film over the glass even with the best cleaner. The cleaner and the wiper are a team, and the windshield stays permanently clear only if both are maintained.

Dr. Wack CW1:100 compared to other wiper fluid concentrates

In the market of wiper fluid concentrates, CW1:100 competes primarily with Sonax, Nigrin, and gas station private labels. The differences lie less in the basic effect and more in the yield and the depth of the product range.

The strength of CW1:100 is the yield of up to 1:100, which many standard products only achieve at 1:50 or 1:25. Concretely, this means a 250 ml bottle lasts longer than a similarly sized container from a competitor that requires a stronger dose. Added to this is the unusual breadth of the range, from the 25 ml bottle to the 5-liter concentrate and the 2.8-liter Ready-Mix. Few manufacturers cover trial sizes, seasonal supplies, and ready-to-use variants so comprehensively.

Compared to gas station ready-mixed goods, the concentrate scores on price per liter of wiper fluid and storage space. A small bottle replaces several canisters. Gas station goods, however, are ready to use without preparation—something the CW1:100 Ready-Mix also offers. Those who use the brand holistically will find P21S for rims and paint alongside the glass care from Dr. Wack, a point that pure wiper fluid providers do not offer.

Honestly speaking: In terms of the pure loosening effect on fresh insect film, the established concentrates are very similar. The difference is made through yield, raw material base, and the question of whether you want a product range that considers the car, motorcycle, and glass together. For extreme cases of burnt-on residue, you would reach for a separate insect remover gel anyway, not wiper fluid. The CW1:100 line loosens everyday film, not stubborn burnt-on extremes, and it is built precisely for this everyday use.

A practical advantage of the concentrate logic also shows when restocking. You don't have to lug heavy canisters every time; instead, you keep a compact bottle in stock and mix as needed. This reduces shelf storage space and makes supplies predictable for months without anything spoiling or leaking. Once someone has switched to the system, they rarely return to ready-made canisters because the value added per stored liter is simply higher.

Your start with the CW1:100 line

For most drivers, the 250 ml CW1:100 Super or Classic windshield cleaner is the right start. One bottle, mixed 1:100, covers a complete summer season with over 25 liters of wiper fluid and fits in the trunk to save space.

If you are looking for a small amount to try out or only refill occasionally, take the 25 ml or 40 ml bottle. It costs little, shows you the effect, and fits in the glove compartment. If you drive a lot and plan for a year or multiple vehicles in advance, the 5-liter concentrate container is the most economical choice, as the price per finished liter of wiper fluid is lowest here.

If you fundamentally do not want to mix, start with the 2.8-liter Ready-Mix and you immediately have ready-to-use summer water with no math required. And if the raw material base is important to you, start with the BIO windshield cleaner. The entire CW1:100 line thus covers every need, from the trial bottle to the fleet supply.

Our practical recommendation: Keep a 250 ml bottle of concentrate for the season and an additional small Ready-Mix canister in the trunk as an emergency reserve. This way, you are traveling economically in the summer and still have immediate clear vision for an insect-filled morning without any prep time. The topic of windshield care doesn't need more effort, and with the predictable "Made in Germany" recipe from Ingolstadt, you know the result will stay the same season after season.