(1) The black plastic hooks to the watch bands fracture. Superglue doesnt seem to last.
(2) The watch band tears. I duct-tape it sometimes. But that is temporary. If I have some bands left over from the other failures, I can replace it.
(3) In high humidity states moisture sometimes gets into the works and shorts the electronics for good.
Just buy another. If I see a clearance sale for $10 or less, I'll keeps a spare. Targets doesnt seem to have casios anymore. But Walgreens and Walmarts does.