Step 6

Get some alcohol and a Q-tip and some canned air if you've got it. Use the canned air on the phone and then swab the internals with your Q-tip. You should have a small amount of alcohol on the Q-tip, do not soak it. Then hit the internals with the canned air one more time to get rid anything that was dislodged by the swabbing, and dry any residual alcohol. Also swab the trackball assembly itself, and hit it with the air to dry.