How to or best way to clean New Table Tennis Balls / Heavily Used Dirty Balls?

I am curious if you guys have a good way to clean the powder off new balls and dirt off of heavily used dirty balls? I consistently am using my Power Pong Omega robot and from all the balls I miss hitting the floor they get a lot of dirt on them. The dirt from the floor gets on the balls and then gets onto my rubber and my rubber gets very dirty as well. The same also happens with new balls but almost worse than old balls. I read that taking a damp microfiber cloth with a very little bit of baking soda would help clean them off? Would that be safe? I do not want the balls to get ruined from me cleaning them because they were expensive but dang all the dust and stuff they’ve collected has to go!