Q&A for How to Remove Urine Stains from a Mattress

Try the hydrogen peroxide-baking soda-dish soap solution, but mix them carefully - don't shake it, or it'll bubble like crazy. Any essential oil (I use lavender) helps dilute any potential smell from the dog puddle.

You can find borax in the laundry section at most grocery stores.

Use a hydrogen peroxide, baking soda, and dish detergent solution to help lift the stain. If the stain is stubborn, create a dry foam with laundry detergent and water. Vacuum the mattress once the stain is lifted.

White vinegar will help to neutralize the smell of urine and to remove the odor.

If you are using a white vinegar solution to remove a wet stain, you can just let it sit and don't need to blot the area. If you are using a hydrogen peroxide solution blot it lightly before letting it sit.

In my opinion, this is not a good idea because of the strength of them all combined. Just dab it with a dry sponge and then sprinkle borax on it. Leave it to dry, then vacuum it up.

You can find it at your local grocery store or pharmacy. It is inexpensive.

Yes but you have to leave it to dry after otherwise it will discolor the bedding and your bed will be whiter or brighter than usual, which you don't want.

Urine contains a form of ammonia, and bleach mixed with ammonia is dangerous to health (the fumes could cause severe illness or worse). Hydrogen peroxide is a viable solution to use on urine stains, and also can clean wounds to an extent, whereas bleach is not for cleaning wounds.