Ok.. they were considering the peroxide mix, then the vet said the Scope. I dont knw what would be in the scope that would help? I will tell them that the peroxide mix has been tried and known to work pretty well. I know nothing will probably work 100% but as long as its not being spread around the house and isnt too horrible, it will be enough. My husband got sprayed once, got just a bit on his upper arm... would not come off! (It had gotten into a live trap)