I have gotten extra careful on occasion and ran an empty load through the washer (just water and 1lb baking soda, no clothes) before I wash my hunting clothes to help rid the washer of any scented residue.
I also leave the clothes hanging out on our covered deck as long as possible before the hunt. If I bring them in, I seal them in a plastic bag or other container, usually the night before at the earliest.
PS:
I started using the baking soda because it became almost impossible for me to find truly unscented products for washing, and even when I could, who really knows amongst all the chemicals what smells to a deer.
I feel pretty safe with the baking soda and I have harvested some deer within 40 yards and less since using it. The closest was less than 15 yards.
And, baking soda is CHEAP!!