There is a large dead bug stuck inside one of my front headlamps. I have no idea how it got in there, and all I am trying to do is get the plastic off to remove the carcass. But, I cannot figure out how to get just the plastic cover off, as opposed to removing the entire headlamp. You see, for the bug to be stuck dead inside, it seems to me that he had to get in there in the first place before he died. But, I simply can't figure out how to separate the plastic lens from the headlamp body to get the bug out. This is driving me batty. Any help? Thanks!