I go through the allergy irritation myself. I don't know what you use to launder with but I get the Arm and Hammer Dye and Fragrance free laundry soap for the material. If you're going to use the bathtub/shower method add some vinegar or a 1/4 cup of ammonia. DO NOT USE A COLORSAFE BLEACH! I would agitate for a couple minutes, then let it soak some more about another 20 minutes depending on how strong the dye or fragrance is. Then like nhweaver stated put them over a chair or wire shelving and turn the shower on. Don't be afraid to use rubber gloves. Rinse couple times. Good luck. I always pre wash my material though.