Parts washers use cleaning solutions that eventually become spent and must be disposed of. Spent parts washer cleaning solutions are considered a special waste in Illinois because they may be hazardous and are an industrial process waste. The fact sheet "Do I Have a Special Waste?" explains special wastes in Illinois. In addition, parts washers generate other wastes such as rags, filters, and sludge. This fact sheet will help you properly manage your parts washer wastes, comply with regulations applicable to parts washers, and reduce wastes generated.