Should I glue the propeller protectors on?

I have Parrot Bebop 2 and ordered propellers protectors that fit below the motors…2 on each side. After installing them , (snapping them on) I did a test to see how well they protected the drone and propellers by lightly brushing the side of a chain link fence. Even with going slow, the impact caused all 4 protectors to come off and go flying, while I got a crash alert on my drone and it stalled out.
The good news is that their was no damage to the drone or propellers. …so I guess the protectors did their job…BUT, I’m not real thrilled that they came off so easily and I had to hunt to find them.
SO…should I just glue them on the drone or is that a bad idea ?
Thanks