I'm sorry, I don't have any solution to your problem, but I just feel this urge to share this story.
When my husband and I bought our house in 1980, there were some trees out back that had to go, so he spent all morning working back there. He didn't bother to come in and use the bathroom, there were trees he had to go, so he went.
Guess where he got poison ivy!!??!!!
(it's still funny)