https://www.reddit.com/r/YouShouldKnow/comments/x6uat2/ysk_homeowners_you_should_clean_your_outdoor_ac/
YSK: homeowners, you should clean your outdoor A/C compressor ...
Sep 5, 2022 ... Get some AC coil cleaner from a store. Spray the outside and let sit for a few minutes. This will loosen up gunk and allow for efficient rinse.