Originally Posted by Thatzmister2u
I would just replace it. The problem with the Bold and the Tour is the fact that you must totally disassemble the unit to reach them. Not that difficult if you are patient. There are step by step instructions. The replacement trackball will cost less than $12 and you can get them as cheap a 5$ on Ebay.
But it will void the warrenty so if anything goes wrong with your phone you will have to pay for it.