WaterSentinelSF-20W Spotless Car Wash Inline Deionized Water Garden Hose Water Filter & Extension Adapter for RV, Boat, Marine, Motorcycle, Home, Windows, Spot Free Wash, Solar Panels (2-Pack)

I have read reviews that said the product did not live up to claimed number of uses but I don't care. I want an easy to use spot-free rinse and that is what I get! So I have stocked up. Combined with a foam soap sprayer, it takes me less time to wash and rinse, and I don't leave scratches in the finish by using towels for wash or dry.

It sucks. It still left spots from hard water on my wife's car. Testing both of them in a daisy chain to see how they work then.

Right out of the box my water shows 200ppm and this filter only knocked it down to 17pmm, after one rise that changed to 27pmm and I still got water spots.

Suprised how well this worked. Still light easy to wipe away spots in parts if sun dries the water. If you towel dry after should be no significant water spots. I’d say about a 90% reduction of what my water was leaving before prior to using this. Follow directions you will be pleased overall. Pricey for a spot reducer but worth the result if you are overtly tidy or a detail person.

I could never get a clean car with hard water from my well until I used this de-ionizer. I am very happy and when you use a leaf blower it makes it even better.

As long as you run with using the “shower”option on a hose nozzle it will actually filter the water and give you a spotless rinse, makes it way easier to dry a car after a wash.

Still landed water spots all over!!!!!!!

I have really bad hard water here in Arizona. Product work for about 3 three car rinses. Need something that will last more for the money.