something not right if falls off all the time. If the 1/4 turn fastener are turned til they lock in it aint going no where. Perhaps your clips have been sprung from improper removal or tightening. Luckly those can be bought. If you lose a screw you'll be buying the whole cover. Storm hang on those 1/4 turn screws, I am sure there are those out there that will pay a handsome price for them.