I take it you mean inside with the pot out?
I turn it up to full heat and take the pot holding the wax out to reveal the inner chamber and all of the wax that mysteriously gets down there. I never know how this happens as I keep the outside of my machine spotlessly clean all of the time and I never drip it..........I'm fantatical about that.
When the wax that has gathered inside is nice and thin, I get a couple of pieces of couch rol and scrunch them up. I then carefully push it to the bottom and wipe. Do this a few times and once all of the wax has been removed, spray with the cleaner and do it again.