I'd try the sticks in another PC.
- If they are fine there, something is wrong with the USB-ports on your PC (either hardware or software).
- If they fail there also, you throw them away. If the story repeats with other sticks, there's some suspicion that your PC corrupts them. That most likely is a hardware issue. That can be confirmed by seeing if that corruption also occurs if you use a stick after booting in Linux.

Kees