Originally Posted by
Phlorida
With the cassette off of the wheel your cleaning options are wide open. I realize that the OP stated "without taking them all apart."
Didja know .... you can fill one of those cheap ultrasonic cleaners from harbor freight with mineral spirits and it won't (IME, don't try this at home, I'm a professional abuser of equipment, etc.) blow up. And it will clean the heck out of greasy, grimy metal parts.