Any good scent-free UV-free liquid detergent will work fine. After you wash it, hang it out to dry in an area where it won't get any un-natural scents. When completely dry, put it in a XL or XXL zip-loc bag. Just before you hunt, put it in the drier on high for 45 minutes. Spray scent-killer in the drier before you dry it. Be sure that your wife is not using scented drier sheets or scented laundry detergent. After you hunt, spray with a little scent killer on the neck and cuffs. Hang out to air out, then bag it again. Regenerate about once every 3 hunts. Try to wash your SL as little as possible to extend the life. Layering under the EXT is a great idea. I do that myself.