If your towels repeatedly develop a sour smell even after washing, the problem may involve how long they remain damp and how they are dried, not just the wash temperature. A study published in 2026 found that washing kitchen towels with detergent at 60°C reduced the tested bacteria more effectively than washing at 40°C. However, these findings cannot automatically be applied to bath towels.

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Research findings comparing washing at 40°C and 60°C

Laundry care labels and restrictions on high-temperature washing

Drying and storing damp towels

Precautions when using fabric softener

Criteria for deciding when to replace towels

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