I was tring to remove the mustard relay and the LKM device from the fuse box in order to clean them. However, both of them will not come out. I pulled on both of them however with no success. I am afraid that if I force them out, I may damage something. Should I just pull even harder or what? Any advice on loosening and getting the mustard and LKM devices out without damaging the contents of the fuse box???? Help?