How it works
Overloading, excess detergent, cool cycles, slow drying, and leaving damp laundry in the washer all contribute. Cleaning the machine and drying towels promptly can break the cycle.
What people often miss
Fabric softener can coat fibers and reduce absorbency, which may trap residue. Never mix chlorine bleach with vinegar, ammonia, or other cleaners.
Why this question comes up
Thick towels can feel dry on the surface while moisture remains deeper in the fabric.
Key points
- Towels smell musty when moisture, body oils, detergent residue, and microbes remain in the fabric or washing machine.
- Overloading, excess detergent, cool cycles, slow drying, and leaving damp laundry in the washer all contribute. Cleaning the machine and drying towels promptly can break the cycle.
- Fabric softener can coat fibers and reduce absorbency, which may trap residue. Never mix chlorine bleach with vinegar, ammonia, or other cleaners.
Bottom line
Towels smell musty when moisture, body oils, detergent residue, and microbes remain in the fabric or washing machine.
Source and verification
This Answer was checked against American Cleaning Institute. Follow the source for the full official explanation and any later updates.