Everyone that knows me knows that I'm no expert, but I'm going to tell you what I've seen others use and it has worked for them. That is good old brake cleaner in a spray can. Please check this out, but it stands to reason that if it removes all grease, etc, from brakes
when redoing them so it should work on bearings. I know guys that have used it do redo the bearings on their cars, so why not? Certainly safer than gasoline.
As I said, I'm not an expert. Just passing on what has worked for others. Anybody else ever heard of/done this?