Not to get into a long story about my experience, but basically you spray it on areas that may be questionable. For instance after a good rain you may have a carmel colored residue on vegitation that was once nice bright red blood. Spray the peroxide onto it and it will bubble if indeed it was blood. Also if you are force to back out and pick up track after the blood has dried it make it easier to detect the dried up blood from the rest of the rusted coloring on leaves in the fall. I had a friend show me this last year and I was amazed. It pretty much found my deer for me.

I just use a regular bottle of peroxide and steal a spray top from one of my wifes bottle that she uses for watering plants or the kids hair. Then when she asked where it went I balme it on the kids.