Yes, you can re-wet the film. If you do, make sure it is submersed long enough to be fully wet. Then dry it just like you would freshly developed and rinsed film. That means dipping thru Photo Flu solution as the last step before hanging to dry.
Of course the drying area needs to be as dust free as possible. Hang it somewhere air isn't blowing around, moving dust around with it. A closet without any cloth in it is usually OK for amateur use. Vacuum the closet before hand, let dust settle, and only open the door briefly and without making a lot of wind to hang the film. Then keep the door closed long enough to be sure the film is dry when you next open it. Over night is usually good.