To keep your pool cover clean, you should regularly remove debris such as leaves, twigs, and dirt using a pool cover pump, leaf rake, or pool cover vacuum. You can also use a mild detergent and a soft-bristled brush to gently scrub away any stains or discoloration. Rinse the cover thoroughly with a hose or pressure washer to remove any remaining dirt or soap. It’s also a good idea to keep the cover tightly secured when not in use to prevent debris from accumulating on it. Additionally, you can use a pool cover cleaner to help remove dirt, grime, and mold.