[joe_padavano]

Outgassing is exactly the problem. The plastics used in these parts continue to give off volatiles. This spooge also condenses on the insides of your windows. I've found that the best solution is to use pre-cleaner solution. This is the solvent that's used to wipe down a car just before you paint it. You can buy a gallon at any auto paint store. The pre-cleaner will not dissolve the plastic. You will likely need to wipe the wheel down every few weeks or so until you remove the remaining volatiles.

By the way, pre-cleaner is a great thing to have around. It won't damage paint, but it will remove a multitude of residues, such as adhesives (from bumper stickers, for example), road tar, bug guts, grease, and many other nasty coatings. Pre-cleaner is also great for cleaning spark plug wires before a show, though be sure to check the compatibility of any date codes or other ink with the pre-cleaner before wholesale wiping down.