Did anyone ever reply to the use of OXYCLEAN as a method of cleaning pet stains on haerdwood floors. I have just removed an area rug from my entry way and discovered a dark patch about 3 inches wide and 10, or 12 inches long where my dog has urinated on the carpet. The rug has been down about a year. I don't know how long its been since this particular incident. We try to clean up anytime that we see that something has happened, but on a dark rug sometimes we miss it.