Some cleaners are too harsh to use to clean your plumbing fixtures with. If you are looking to extend the life of your plumbing fixtures, you should avoid cleaning with the "finish killers." "Finish Killers" to Avoid: Industrial cleaners and abrasive cleaners, such as those used for toilet bowls, green Scotch-Brite heavy duty scrub sponges, Scrubbing Bubbles Bathroom Cleaner and Lysol Basin Tub, ...