Unless you're replacing the studs for some reason, leave them alone. Not needed to clean the hub.
If DIY, get a supply of latex or equiv. gloves to minimize the "yuck-in-hand" clean up, a plastic bucket, big enough to submerge one hub and some degreaser.
FWIW, here's a short list of degreasers/cleaners. Not sure if the blogger got paid or is really into testing and rating degreasers:
Top 25 for Best Degreaser
Water solubility is handy for rinsing. You'll need a minimum of one gallon, so shop accordingly. In addition, some of these may affect aluminum (e.g. Simple Green - check the archives, and Pine-Sol isn't), so make sure it's safe for soaking aluminum parts.
Do I need to remind NOT to use gasoline or other highly explosive liquid?
Cleaning a wheel hub isn't near prepping for brain surgery. It's perfectly acceptable to remove old grease with your finger, then clean the hubs with a supply of old rock and roll t-shirts and spit. One's threshold of "clean enough" is variable.
Sherwood