active foam application. Contactless washing, water jet from the high-pressure apparatus. This is the most common method of washing in Russia. However, due to the violation of technology or the use of cheap / low-quality detergents or their high dilution in pursuit of savings, car washes sometimes rub the foam with a sponge or cloth, and this is no longer a contactless sink. Moreover, this practice is dangerous to the health of car washers – an active foam for contactless washing contains some alkali or acid that can irritate the skin of the hands.