Same here. I tape one set to a pair of Lacrosse knee boots for the rocks. Since I don't wade in them, the tape holds quite awhile
I still managed to lose a Korker once, even tho I had 5 wraps around my wader boot, in the weed bowl near Scott's at Montauk
I'd say buy the old style lace-ups and duct tape them. I had one pair of the sandal style and they didn't last any longer than the lace-ups, and still needed duct tape to feel totally secure.