M.K.
How about giving her the responsibility of wiping her own hands with a baby wipe after eating? My kids loved to "be in charge," so I would hold the baby wipe container and they would pull one out and wipe their own hands (while I moved the uneaten food out of the way, etc.) Yes, you'll have to go back and give her hands a thorough cleaning, but this may be enough to distract her from wiping on her clothes. Make a big deal about what a big girl she is!