I usually wipe the wheels after a trip with Fantastik or 409 (or whatever cleaner is handy), and pick out obvious bits of debris around the wheels before putting it back in the closet.

But last week, my checkin came out with what looked to be some kind of lotion smeared on the back (presumably somebody had a spilled bottle of something in their luggage) so I wiped the complete back.

Just wonder if anyone else does any cleaning of their luggage? If you do, any tips?