Troy,
I wipe down with isopropyl alcohol and paper towels folded in quarters. If infected, it's usually through the dog. He'd get the oil on his fur and then deposit it on the couch, etc. So when he'd get in it, he'd also get wiped down. I always have a big spray bottle of isopropyl alcohol in the truck.
Glad to hear your enjoying your new place, with the exception of the poison ivy.
