409 and Simple Green, or any other cleaner/degreaser is okay, and will NOT leave a film if you use hot water in conjunction with them. Hot water removes any film or residue, and i have NEVER had aproblem with my ball's reaction, as a matter of fact they react better when cleaned, even with what I use. JMHO!!
Dave
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If You Are Not Using a BuzzSaw, All You Get is SAW-dusted; if you Upset Clump, You Gets Clumped Up!!