[header] How to remove mildew smell from clothing [title] Check your washer. [step] It may sound strange, but your washer could be the source of the mildew. Front-load washing machines are especially prone to trapping moisture and growing mold and mildew over time. 
Pour percarbonate solution in the detergent slot, and vinegar in the fabric softener slot. Run your washer on the sanitary cycle, and toss some of the percarbonate solution into the gasket for good measure.