US Patent 7793373 Method of repetitively conditioning cleaning cloths with cleaning solution

Window cleaning cloths are repetitively conditioned for cleaning windows in a commercial car wash by processing the cloths in a washer-extractor having in sequence a wash cycle, a first rinse and spin cycle and a final rinse and spin cycle. A detergent and degreaser are added to the water used in the wash cycle. A window cleaning solution is added to the rinse water used in the final rinse and spin cycle to saturate the cloths with a diluted mixture of water and window cleaning solution. A substantial portion of the diluted mixture of final rinse water and window cleaning solution is removed during the final rinse and spin cycle to provide a window cleaning cloth uniformly dampened with window cleaning solution for cleaning windows without necessity of spray application of cleaning solution. The cloths are reprocessed and used in the same manner.