I've come across several of the homemade scent killer recipes. I used the store bought 3% and it seems to work great. The other day, I spooked a doe in a field I never knew was there until I started to lower my bow and heard her jump. She was only 10 yards away. After a brief staredown, she started going about her business when I was about to stand and another doe walked out. She knew exactly where I was and something wasn't right. After another brief staredown and several minutes of stomping with her nose in the air the whole time she just jumped and walked back into the woods. I believe she never caught my scent but knew something wasn't right in the tree. I've heard some bad things about the 30% peroxide that has to be dilluted. There was a link posted that detailed how dangerous it was. I would go with the store bought, everyone else seems to use it with no problems are all.