I know it's an old thread that got bumped up. LOL I use an oxy product and it seems to work just as well as the Oxy-Clean, I think it's Sun Oxy or something like that from Walmart, a lot less expensive. Hydrogen peroxide is good for going on things like blood stains, the sooner the better, but it even helps with dried ones. I'll soak the spot with HP and let it sit for a while.
I should never overestimate my basic arithmetic skills.