The When-to-Wash-It Handbook
How often you should wash them: After 2 to 3 wears.
What to know: Light-colored cottons are vulnerable to noticeable spots. Zap smudges between washes with Oxi Clean Spray-A-Way Instant Stain Remover ($3.50 at drugstores), which Chicago stylist Amy Salinger likes because it doesn’t leave water rings behind.
Exception to the rule: With stain-resistant fabrics, you can get away with an extra wear or two. Never use fabric softeners or dryer sheets, as they diminish the effectiveness of the fabric.