Anyone wash their coach with a deionized wash system?

The DIC-20 provides approximately 300 gallons of mineral-free, de-ionized water based on your water input quality. It consists of two 20 inch de-ionization housings that feature replaceable and/or refillable cartridges that simply slide into the watertight tubes. The entire unit is mounted on a powder coated, rust resistant rolling cart that makes it convenient to move into position and store away when finished.