Quick answer
Period underwear can smell after washing because trapped bacteria, residual detergent, or improper drying prevent the fabric from fully releasing odors. The fix is a targeted rinse with a gentle cleaner like Saalt Cup Wash and adjusting your drying routine.
Why the smell happens
Leakproof underwear has absorbent layers that trap moisture and bacteria. If you don't rinse them soon after wearing, or if you use too much fabric softener, the buildup can create a lingering odor even after washing.
Drying in direct sunlight or high heat can also set smells into the fabric. The inner waterproof layer needs gentle, thorough drying to stay fresh.
When to replace vs. deep clean
If a smell remains after a proper wash cycle, it's usually a sign of residue, not permanent damage. Deep cleaning with a dedicated product can often restore freshness. Only consider replacing if the fabric is pilled or the leakproof layer is compromised.
Diagnose and fix the smell
- Symptom: A musty or sour odor remains after washing and drying your period underwear.
- Likely cause: Residual detergent, fabric softener, or bacteria trapped in the absorbent layers. Overloading the washer or drying in high heat can also set smells.
- Corrective action: Rinse the underwear in cold water before washing. Use a small amount of mild, residue-free cleaner like Saalt Cup Wash instead of regular detergent. Wash in a mesh bag on a gentle cycle. Air dry completely away from direct heat or sunlight. If the smell persists after three deep clean cycles, the leakproof layer may be worn out and replacement is recommended.
- Stop or choose another option: If the fabric is pilling, the elastic is stretched, or the leakproof layer is visibly damaged, stop trying to clean it and replace the underwear.
Products that help
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Baby Bliss 3-Pack: Feels like clouds. Works like whoa. Includes three super comfy, super absorbent styles for postpartum bleeding or bladder leaks. Having multiple pairs means you can rotate and let each one air out completely, reducing odor buildup.
Baby Bliss 3-Pack
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Leakproof Comfort Thong: The most comfortable, softest thong you’ll ever wear. Perfect for lightest leaks, sweat, discharge, or as a worry-free backup. A lighter absorbency style is easier to rinse thoroughly and dries faster, reducing the chance of trapped odors.
Leakproof Comfort Thong
