How to Clean Mildew From Caulking

Mildew is a fungus that thrives in moist, warm and dark environments. Caulking is a process which seals seams and joints, most commonly around bathtubs and sinks. The warmth of a home and the moisture in a bathroom (which can be compounded by drawn shower curtains creating a dark area) gives mildew a perfect growing environment. Routinely cleaning the bathroom, including the caulking, with a product containing bleach can help prevent mildew from forming. Once mildew is found, it should be immediately cleaned, for easier removal and to prevent mildew stains.

• 1

  Combine equal parts household bleach with warm water in a spray bottle. Swirl the bottle to mix.

• 2

  Spray the mixture directly on the mildewed caulking. Allow the bleach to work into the mildew for 10 to 15 minutes.

• 3

  Spray the mildew again with the cleaning solution. Use a soft-bristled brush, such as an old toothbrush, or a sponge to clean the caulking. Rub or brush the caulking to remove mildew.

• 4

  Dampen a cloth in water as hot as you can stand to touch. Wipe away the bleach solution and residue.

• 5

  Repeat the process until all of the mildew is removed or until you reach a point where no more mildew is being removed. If it looks like mildew is still there, but it's not removing despite several treatments, it's likely a mildew stain.

• 6

  Add a cup of white vinegar to a spray bottle. If you're sensitive to the smell of vinegar, you can dilute the vinegar with a cup of water.

• 7

  Spray the vinegar directly on the caulk. The acid nature of the vinegar hinders the growth of future mildew.