If you're experiencing a mildew smell on your towels, despite using them only once before washing, there are a few additional steps you can take to help eliminate the odor and prevent it from recurring:
Wash with hot water: Try washing your towels using hot water instead of cold or lukewarm water. Hot water can help kill bacteria and fungi that may contribute to the mildew smell.
Use an oxygen-based bleach: Add an oxygen-based bleach to your wash cycle, following the product instructions. Oxygen-based bleach can help remove odor-causing bacteria and brighten your towels.
Avoid fabric softeners: Fabric softeners can create a coating on towels, which can trap odors and reduce their absorbency. Skip the fabric softener when washing towels to prevent any buildup that may contribute to the mildew smell.
Dry towels thoroughly: After washing, ensure that your towels are completely dry before storing them. Moisture trapped in folded or damp towels can lead to the growth of mildew. Use a dryer or hang the towels outside to dry in the fresh air and sunlight, if possible.
Increase air circulation: Ensure your bathroom has good ventilation to allow for proper air circulation. Moist environments are conducive to mildew growth, so opening windows or using a fan can help reduce moisture and prevent odors.
Wash towels separately: To prevent cross-contamination and ensure proper cleaning, wash your towels separately from other laundry items, particularly items that may be heavily soiled or carry bacteria.
Consider an antibacterial laundry additive: There are laundry additives available that contain antibacterial properties. Adding one of these to your wash cycle can help eliminate odor-causing bacteria.
Store towels properly: When storing towels, ensure they are completely dry. Avoid leaving them in a damp or humid environment, such as a tightly closed linen closet. Instead, store them in a well-ventilated area.
Regularly clean your washing machine: Over time, residue and bacteria can build up in your washing machine, contributing to unpleasant odors. Run a regular cleaning cycle with hot water and a cup of vinegar or a specialized washing machine cleaner to keep your machine fresh and odor-free.
If you've tried these steps and the mildew smell persists, it might be worth considering replacing the towels, as the odor may be deeply embedded or caused by a manufacturing issue.