I just use the Scent Away Brand detergent. It seems to work pretty well. One thing I never thought of until a couple years ago, but when you do a load of hunting clothes laundry, throw in 3-4 towels and washclothes and also some non-hunting clothes to wear to the field while riding in your truck/suv so that your body stays scent free. What I do is get those gallon zip-loc bags and I stuff 1 towel in each of them (about 3) and then I put them in my closet in my bathroom. Those are my pre-hunting towels. Same thing with my undershorts and socks, i put them in ziploc bags after I wash and dry them so that they stay absolutely scent free. The rest of my clothes I leave in a 10 gallon storage tote. I like what HM said about putting a cedar branch in there with your clothes, helps them stay woods-like fresh.