[cypher]

Over cleaning wheels is generally counter productive, the more you clean the more they pee in them!
You really don't need to use vinegar & it's quite hard to remove the smell afterwards so I wouldn't recommend it.
I only clean wheels once a week with just water, if you really feel the need to clean more often a wipe with damp paper towel as Razor suggested is fine, I wouldn't worry about it though, they like their wheels that way & it doesn't do any harm to leave them a while before cleaning.
Toys rarely need cleaning unless they get peed on, water is more than enough usually if they do need a bit of a clean.