Home Interior Design My mom also swears by this. Cleaning your toilet with coca cola will get out the nastiest stains! One pinner said: “I had my cousin try it when they bought a house and the toilets were disgusting, this trick left the toilets looking like new! I have also used Coke for cleaning soot off of the fireplace heat box, or outdoor grill. I’m glad I don’t drink this stuff if it is that great of a cleaning product!” Interesting!