How to Remove Mold From the Back of a Bath Mat

Remove the mat from the bottom of the bathtub and lay it inside the bathtub with the suction cups facing up.

Cover the underside of the mat generously with bleach spray. Each suction cup should have a pool of bleach in it. Allow the bleach to soak into the mat for roughly 10 minutes.

Spray the bathtub abundantly with bleach and scrub with a cleaning brush. If the bath mat has mold growing on it, the bathtub floor probably does too. Keeping the floor clean is just as important as keeping the mat clean.

Scrub the back of the mat vigorously with the cleaning brush and rinse thoroughly with water. Bleach is a very harsh chemical that can severely irritate skin, so it is essential to spend extra time rinsing the bath mat.

Allow the bath mat to dry before readhering it to the bathtub floor. Moisture will only breed more mold. A thoroughly dried bath mat adhered to a dry bathtub will help prevent any future mold growth.