clipped from: www.wisebread.com   
Note: NEVER clean any CD or DVD in a circular motion. Always clean in straight lines from the center of the disc outwards. Otherwise, you'll just make things even worse.
Toothpaste.

Warning: The next video contains a scary ending at the 1:09 mark.

My results: 3/5
Banana
Results: 2/5

Chewing Gum.

Results: 0/5
Brasso (metal polish).
Results: 4/5