Turn on the fan in your bathroom as well to help keep air circulating. If you don’t have a window in your bathroom, take extra care not to breathe the fumes in directly. Leave the room as soon as you pour the chemicals out and spend as little time in there as possible.

There may be some other safety steps for the particular product that you use, so always make sure to read the instructions first. If you do get any chemicals on your skin, wash the area immediately with soap and water. If you get any in your eye, rinse it with lukewarm, running water for 20 minutes. [4] X Trustworthy Source Mayo Clinic Educational website from one of the world’s leading hospitals Go to source Get medical attention if your skin or eye is irritated.

If you’re not cleaning stains under the water line, then you don’t have to drain the bowl.

Pour slowly and be very careful not to spill any restorer out of the bowl. It could stain furniture and rugs. Don’t breathe in while you’re pouring the restorer so you don’t inhale the fumes directly.

Rub gently so none of the restorer splashes out.

It’s best to leave the bathroom while you wait so you don’t inhale any of the fumes. If the product you use recommends a different amount of time, follow those instructions instead.

Scrub the rest of the toilet bowl as well. You can even use a pumice stone to remove hard water spots, calcium deposits, or other difficult stains. [8] X Expert Source Eduardo PeraltaHouse Cleaning Specialist Expert Interview. 29 October 2021.

You might have to flush a few times to get rid of everything.

If you’re fixing scratches above the water line, then you don’t have to drain the water.

If you do get any chemicals on your skin, wash the area right away with soap and water.

Different products might have slightly different instructions, so follow the instructions provided.

The most popular scratch remover is Bar Keepers Friend. Some users also say that cleaners like Comet work as well. Liquid cleaners like CLR can also work if you scrub them into the scratch. Cleaning a scratch might seem weird, but scratches show up because of gunk and mineral deposits in the crevice. Cleaning this out actually makes the scratch disappear.

Start off with light pressure and gradually press harder to work the stain out. Remember to keep your gloves on so you don’t get any chemicals on your skin.

It might take more than one treatment to get rid of very stubborn scratches. If the scratch still won’t go away after multiple treatments, it might actually be a crack. Contact a plumber to come look at your toilet and advise you on any repairs you might need.