The Cleano indoor ultrapure water cleaning system is for indoor glass and surfaces. It combines the cleaning power of pure water and microfiber in a light, compact and entirely mechanical tool (no cords, no batteries, etc.). With the non-drip micro-spray technology, the water is evenly dispursed with a very fine mist guaranteeing optimal distribution. The Cleano keeps glass clean longer. With no chemical residue being left behind on the glass dirt will not be attracted to it, reducing the frequency of cleaning intervals. Fill with distilled water or DI/RO water.