How to clean grout mildew

Because grout is porous it can absorb more moisture and thus helping mildew to form. Cleaning the grouts will prevent the mildew from spreading.

Tools and Materials:

  • Oxygen bleach (liquid or powder)
  • Measuring cup
  • Gloves
  • Two buckets 2
  • Sponge
  • Mop
  • Hot water
  • Stirrer or painter’s stick
  • Stiff-bristle scrub brush

Safety measures

Although you will be sing oxygen bleach, which is non-toxic, it is still indicated that you wear a mask and gloves.

Also make sure that the area that you’re working in is well ventilated.

Preparing the area

Remove all object that are in the area that needs cleaning. You will have more space and also these object won;t be affected by the bleach.

Preparing the cleaning solution

Mix 50 ml of oxygen bleach with a liter of water, or any proportional quantities. Use hot water for more efficiency.

Applying the mixture

Use a sponge or a mop for the job. Soak the grout and let the solution sit for about 15 minutes. Thus the bleach will enter the grouts’ spores and kill any mildew.

Scrubbing and rinsing

Use a scrubbing brush or an abrasive sponge. Scrub the grout thoroughly and after you have finished the job rinse the floor with some hot, clean water.

Repeat the steps if the mildew hasn’t been removed.


After the grouts have dried, see if there is any more mildew. Once it dries the grout gets more bright.

Reducing the humidity levels you can avoid having to deal with mildew problems.

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