Patent ID: 6924257

Claim:
A method for washing a vehicle, the method comprising steps of: (a) applying water against a solid detergent provided within a solid detergent reservoir to generate a liquid detergent concentrate, wherein the solid detergent is provided in the form of a block, and the water applied against the solid detergent is provided at a relatively constant temperature within a range of about 40° C. and about 150° C. as a result of heating in a water heater; (b) collecting the liquid detergent concentrate in a liquid detergent concentrate reservoir, wherein the solid detergent reservoir, the water heater, and the liquid detergent concentrate reservoir are components of a device for generating a liquid detergent concentrate from a solid detergent; (c) withdrawing liquid detergent concentrate from the liquid detergent concentrate reservoir and combining the liquid detergent concentrate with water to provide a use solution; and (d) washing the vehicle with the use solution.