Watch using the EZOff cleaner, it's basically sodium hydroxide, same crap as Drano, or lye, now lye will decompose any organic matter, grease, hair, bodies, yea, even you. So it can do some funky things to wood, discolor it, cause blemishes, just say chemical burn the wood, and do other things like severe whiskering. I know lots of people have used it, had good luck, but the same amount have used it and lets say, it didn't come out quite right.
Purple Power is a decent cleaner, it's got a certain nastyness about it, but it's a little easier to deal with and a little less harsh, or Simple Green.