3 Dollar Ball Cleaner.
Go to the Dollar and purchase:
Alcohol $1
Clear Ammonia $1 (not the sudsy brand!!!)
Clear Vinegar $1
Pour 1 cup of each into spray bottle.
Clean all balls used after every set.
The Ammonia and Vinegar pulls the oil, dirt,and belt grime out of ball cover stock. The Alcohol also helps clean and evaporates the mix quickly.
This mixture will not alter the surface of the ball.
If polished, it will stay polished.
If dull, it will stay dull.
I actually hit my equipment right after and right before any league or practice usage. Balls are expensive these day. Early ball death can be prevented.