believe this or not bud...but i bought a beat up hero of this mechanic. when i bought the phone, the trackball was nearly black. i used a lint-less cloth and rubbing alcohol every night on it for about a week. it looks brand new now next to my other hero. it all doesn't come off at once but if you keep cleaning it, it will get very close. don't use TOO much alcohol, just enough to get the cloth damp. it worked really well for me.