Yeah it's is a love hate type of relationship. I hate taking the top apart to clean it. It's why I now have 3. I am now only using 1 as a hatcher. For me it's impossible to get the humidity up without a sponge. My turner is still working but every once in a while stops. It also makes a clicking noise. This started in the first year. I have to say it's not an all bad incubator but should be cheaper.
So I would think your turner is on the way out as well. I certainly didn't overload it or anything, just poor design. Must make time to take it apart and try to figure out if the clutch needs replacing or something else is wrong. Apparently they know about the problems because there are a lot of extravagant replacement parts to fix them.