How to remove a mold smell in a drain

Written by mary ylisela Google
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How to remove a mold smell in a drain
Even when your sink is clean, your drain can harbour smelly mould. (down the drain image by pix29 from

Your sink and bathtub drain are exposed to all kinds of substances. Food, grease, moisturising hair and body products can all build-up in your drain. As build-up occurs, it attracts dirt, which in turn attracts mould and mildew. Once mould begins to grow in your drain, an unpleasant odour can emit from your drain, even when your sink or bathtub surfaces are sparkling clean. Clean your drain regularly to prevent mould smell and help your sink or tub smell, as well as look, clean.

Skill level:

Things you need

  • 1 cup baking soda
  • 1 cup white vinegar
  • Pot
  • 1/2 cup lemon juice

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  1. 1

    Pour 1 cup baking soda down your drain. Allow the baking soda to sit in the drain for 20 minutes. Baking soda is a natural deodoriser and will begin working immediately.

  2. 2

    Add 1 cup white vinegar to your drain. The vinegar and baking soda will react, chemically, by foaming. The combination cuts grease in your drain, breaks down food particles and kills mould and mildew. Let the mixture sit in your drain for 20 minutes.

  3. 3

    Boil water in a pot, then slowly pour it down your drain. The boiling water rinses away the vinegar and baking soda, as well as grease and grime that has been loosened.

  4. 4

    Pour 1/2 cup lemon juice down the drain if any mould smell remains. Lemon is also a natural deodoriser and mould killer. Leave the lemon juice in the drain for a minimum of 20 minutes or until you next use your sink, then rinse with plain water.

    How to remove a mold smell in a drain
    Lemon juice deodorises and cleans your drain. (Lemon juice image by Monika 3 Steps Ahead from

Tips and warnings

  • Dirt and grime must exsist in order for mould to grow. Keep your sink drain clean in order to keep mould and mould smell away.
  • If your drain is connected with your garbage disposal, grind lemon slices once a week to keep the drain fresh-smelling and clean.

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