The phrase "clean on" means to thoroughly clean or tidy up something. There are several synonyms that can be used for this phrase such as scrub, cleanse, purify, sanitize, disinfect, and spruce up. Scrub typically refers to cleaning a surface with an abrasive agent like a brush or sponge. Cleanse, purify, and sanitize refer to cleaning to remove harmful substances or impurities. Disinfect refers to killing germs or bacteria to reduce the risk of illness. Spruce up is a phrase used for cleaning or tidying something in preparation for an event or occasion. Overall, using synonyms for "clean on" can add variation and clarity to your language.