Open the mouse below, the area under the mouseball can be slid to an "open" position.
Take out the mouseball and gently clean the insides, if you can hear one of the 3 wheels that direct the mouse squeaking, put on a tiny bit of seweing oil or similar, that will fix the noise.
Or do like the rest of us, throw the crap out and buy a new one :p
Good luke with Kale, not too long ago I was in one of the first guilds to take down Illy and daaamn that was a lot of work
What did you draw??