Keeping your Discs Clean

I am sure everyone has discs that have dirt that just come off no matter how much soap and scrubbing you do. I am sure that adds unnecessary weight. I was just wondering if anyone has anything that gets the dirt off the discs. Because I have tried alot and can not for the life of me get my Flx Predator clean. Or does it have something to do with the plastics? and Temperatures heating up and cooling down kinda absorbing the dirt in the plastic through the pores. I just want something to get the dirt off and my discs shining like new.

[Disc Player Sports]

When using chemicals, wear the rubber gloves for a few bucks!
Better to spend a few for safety sake!