Smo groomed her stomach bald over the past month and developed a couple hot spots, and we realized it was because of the new cat tree we got - it was treated with some strong-smelling chemicals that Smo had an allergic reaction to. We removed the cat tree a couple weeks ago and she's already getting her undercoat back in. I used the Furminator on her during the overgrooming/cat tree phase, and I don't want to use it on her again without cleaning it in case there's chemical residue left behind. What's the best way to do this? It seems like there are parts that could get waterlogged if washed, but I don't know if wiping down the brush would get all the chemicals off.