Clean T-Shirts and Clothing
First and foremost, all tee shirts and clothing should be clean. Obvious you say... but if you send t-shirts that smell like smoke or mothballs ( or worse - sweat*) - your quilt is going to smell like mothballs!!!
*Note - for odors that don't seem to want to come out of clothing like athletic jerseys; just add a cup of vinegar to the laundry during the soap cycle.