Review on Clean Your Tank Efficiently with Valterra V22011 Sensor Power Tank Gauge Cleaner - 16 oz. by Tim Jenkins

We live in our camper van Prak all the time We have found that we need to clean the sensors about every 4 months since we are not on the move so that no water can splash. When the gray water tanks are empty, I use about half a bottle for each gray water tank. We then use the tanks as usual and leave the product in the tank for at least 24-48 hours. Then empty the tanks as usual. If you have not used sensor cleaner before, you should drain the tank(s). Drain the product down the drain and fill the tank(s) with clean water. DO NOT empty the tank(s) for at least 24 hours. Then empty the tank. Depending on how much dirt is on the sensors, you may have to do this twice.