if you must and don't want to trust the others you can use peroxide, distilled water, and baking soda all mixed together and let stand for a couple days. spray it on. i had a nice eight pointer last gun season at 20 yards and he looked at me and spooked. ran about 20 yards past me and started smelling(he was now downwind of me) but never spooked. i took the shot and took the nice eight for my gun season. don't know how long it lasts but worked as far as a scent killing spray in my opinion. oh by the way it only cost about 4.oo dollars to make and i had a whole gallon. just used a spray bottle i had in garage that was thouroughly washed out i might add. sry for the long post. here is recipe

1 quart hydrogen peroxide
1 gallon distilled water
1 box baking soda.