Review on 💧 WaterSentinel SF-20W: Spotless Car Wash Water Filter & Extension Adapter for All Vehicles, Homes & More - Deionized, Spot Free Technology! by Terrance Fisher

I washed my old car so little, well, old. And it was a lighter color too. My new shiny black car was water-stained from the first wash and little did I know I had a water problem. I was skeptical but tried this filter and after the first wash it was absolutely spotless. What else can I say? Is working! I update my car again a month later and there are water stains everywhere. This filter seemed to work great the first time, but I'll have to reconsider my review. This should give you about 20 washes. I even went back and washed everything again and there are water stains everywhere. Won't buy this again.