Most people out there clean their belts with Windex, well this is right and wrong, One of the things I tell all my clients is to treat their belts as a piece of fine jewelry. Do not dropped it face first on the floor, and do not use it as a gimmick to hit another wrestler. Yes these belts can take abuse but ALL BELTS WILL BREAK EVEN THE CUSTOM ETCHED ONES. Take pride in your investment. At wrestling shows we use the policy of " If you break it , You bought it!!:" 

Cleaners that are safe

Windex with No Ammonia

Car wax that says it is safe on Clear Coats.  ( NOT THE CLEANER WAX )

Use a soft eye glass towel.

Things NOT TO USE ON YOUR BELTS

A cut up T shirt

A Jewelry Cleaning Towel

Ammonia

Alcohol

Bras-so

Comet

Bleach

Any Abrasive cleaner

Paper towels