Universal Cleaning Gel is ideal for cleaning dust, debris, crumbs and pet hair from hard to reach nooks and crannies in automobiles, computer keyboards, TV remotes, printers, calculators and more. Do not use on glass, fabric or wet surfaces. Do not rub gel into area being cleaned, just press onto surface. After use, knead the gel and simply put it back into its jar. Universal Cleaning Gel can be reused several times until it turns dark in color.