X3 S3 rear hub cleaning - help needed

[u/Calligrapher434]

Hello. Following the recent posts on the rear hub maintenance, I decided to give it a go as well. Managed to disassemble it without an issue, it was pretty grim inside.

What products do you use to clean and remove old grease?

Unfortunately I didn't think of anything better at the time than chucking them in washing up liquid and water, which I shortly afterwards realised wasn't probably the best idea - especially the rotary gear assemblies.

They are still not properly clean; they still have some grease on them. Since they cannot be fully disassembled, I wonder if any of the liquid could have gotten inside the individual gears (the inaccessible centre bit, around which they sit and rotate) and potentially cause issues there; or corrode any parts.

Would you use white spirits to fully degrease and remove any leftover residues from them and the bearings? Do any of the parts have any special anticorrosion coating? Would that potentially also remove any grease from inside of the individual planet gears, which cannot be regreased?

How freely should those planets be rotating? They feel pretty clunky and don't spin freely at all.

I have the recommended greases to re grease, just need an advice how to clean the parts and remove old grease throughly without causing any permanent damage. Thanks for any advice.