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Rainy Season Laundry Care: 5-Step Know-How to Prevent Musty Odor/Mold

Published: February 4, 2026
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☔️ Rainy Season Laundry Challenges: 5-Step Know-How to Completely Prevent Musty Odor and Mold

The highly humid rainy season is the worst time for laundry management. Clothes often don't dry well, leading to a musty, unpleasant odor. This smell is caused by Moraxella bacteria (mold fungi) that breed in high humidity. Failure to control this bacteria can result in mold growing on clothes or the odor becoming fixed in the fabric. We share 5-step know-how to keep your laundry fresh and dry even during the rainy season.

🔑 Core of Rainy Season Laundry Care: Blocking Bacterial Growth Environment

During the rainy season, sanitization during the wash process and blocking humidity during the drying process are most important.

💡 5-Step Solution for Preventing Musty Odor

1. Never Pile Up Before Washing (Habit Improvement):

  • Piling up wet or sweaty laundry in a basket traps moisture, leading to a rapid increase in bacterial growth rate.
  • Dirty clothes should be washed as soon as possible or hung in a well-ventilated area until they can be washed.

2. Bacterial Removal: Use Hot Water and Oxygen Bleach for Pre-Wash:

  • It is crucial to kill the odor-causing bacteria. Soaking smelly clothes for 10 minutes in warm water (40°C50°C / 104°F122°F) with a small amount of sodium percarbonate (oxygen bleach) before a regular wash maximizes the sanitizing effect.

3. Use Vinegar During Rinse (Sanitization and Neutralization):

  • Add 1/3 cup of vinegar during the final rinse. The acetic acid in vinegar neutralizes detergent residue and exhibits excellent sanitizing and odor-removing effects. (The vinegar smell evaporates during drying, so there is no need to worry.)

4. Drying Core: The War Against Humidity (Dehumidifier/Fan is Essential):

  • Do not hang laundry densely in a small space; leave wide gaps between items.
  • You must run a dehumidifier and direct a fan toward the laundry to force air circulation for quick drying. Shortening the drying time to within 3 hours is key to preventing odor development.

5. Remove Drum Moisture (Block the Source of Bacteria):

  • Mold easily grows in the washer drum during the rainy season. After washing, always leave the washer door and detergent dispenser open to dry the interior, and perform a drum cleaning once a month.