Definitely get it on paper towels treated with provent a mite.
Also you need to let the provent a mite dry way more then 10/20 minutes...Not sure of an exact time (few hours at least) because I haven't used it in years, but it should give a dry time on the can...
I was under the impression that this was fresh aspen bedding that he had treated with PAM, not the old mite infested bedding.