Knowing how to clean exhaust tips at home starts with high-quality metal polish, wheel sealant, ultra-fine wire wool, and a wheel cleaner with a fallout remover. Aggressively scrub the tips with soap, water, and a rugged towel. Vigorously scrub the exhaust with your wheel cleaner and towel. Rub the wool on the exhaust tips. Polish them with metal polish, then use the sealant to lock in that shine.