It's actually the water in the Windex that does the job but to each his own...
I just use hot water and a spot of dish soap...
As easy as it is to take down, I just go ahead and do that each time, that way I don't have to worry about getting the wood wet.
If you did miss a spot or two, it'll be fairly obvious a day or three later then you can adjust your cleaning method accordingly...
Now hook us up wit sum dam pichers!!!