I changed the battery in my duotrap sensor today. Some how in the process when reinstalling I rounded out the 2.5 allen head screw. Now needing to remove again and put a decent battery in (I think the cheap ass battery I got from Dollar General is not worth a crap). The screw head recesses into the plastic cover for the sensor. Scared to bang on it too much. Any suggestions for removing that screw? Would appreciate any help. Will not be buying anymore cheap ass batteries from Dollar General.