How Do I Remove Dark Stains on a Bathroom Floor From a Wet Carpet?


A wet carpet or rug left on your bathroom floor can create dark spots. These dark spots are typically caused by mold and mildew that can grow under the wet carpeting, staining the bathroom floor below. Mold and mildew must be removed as soon as possible to keep it from spreading to other areas. Fortunately, cleaning mold and mildew from your bathroom floors is a relatively simple process that uses a few common household items.

Things You'll Need

  • 2 sawhorses
  • Spray bottle
  • Bleach
  • White vinegar
  • Scrub brush
  • Toothbrush
  • Rags
  • Sponges
  • Towels
  • Bucket
  • Wooden spoon
  • Fans

Dark Spots on Bathroom Tile Flooring

  • Remove the carpet from the bathroom. Prop the carpet up on two sawhorses so it can dry thoroughly.

  • Fill a clean bottle with equal parts bleach and water. Swirl the bottle gently in a circular motion to mix the contents together. Alternatively, fill the spray bottle with undiluted white vinegar.

  • Spray the tile grout with the bleach-water mixture. Scrub the grout with a scrub brush or toothbrush. Wipe the grout clean with a damp rag.

  • Apply the bleach-water mixture to the dark stains. Allow the mixture to sit on the stains for several minutes. Apply more of the mixture to the stains and scrub with a clean sponge. Continue in this manner until you have removed all dark stains from the floor.

  • Wipe the floor clean with a damp cloth and towel dry.

Dark Spots on Bare Wood Bathroom Flooring

  • Remove the carpet from the bathroom. Prop the carpet up on two sawhorses so it can dry thoroughly.

  • Fill a bucket with 1 gallon of warm water. Add 2 cups of bleach and mix thoroughly with a wooden spoon.

  • Saturate a scrub brush into the mixture. Scrub the dark spots with the scrub brush. Allow the mixture to sit on the bathroom floor for five to 10 minutes.

  • Scrub the dark spots once again with the scrub brush saturated in the mixture.

  • Rinse the floor by wiping with a rag dampened in cool water. Dry the area with a towel. Point fans towards the bare wood floors to help speed up the drying process.

Tips & Warnings

  • Wear rubber gloves when working with bleach to prevent skin irritation.

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  • Photo Credit red bathroom image by Jeffrey Sinnock from
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