I've had an Armarkat for about 2 years now. My cats love it and it's still holding strong. I bought a premium one with a wide base so it's nice and sturdy. Their stuff is also very easy to assemble.
Because they've all been in great condition, I mostly just vacuum them really well, sometimes I went over them with a wet towel and Dawn first. In a couple cases, I saw the cats that belonged to them, one of which came with my first tree. None came from indoor/outdoor cat homes so I had no fear of fleas. Two of them were being "rehomed" because their cats refused to use them.Marie, I love the thought of glancing craigslist for trees that need a new home. What do you do to clean them up?