Evening gentlemen. I have a 1992 f150. Same headlight bulb for 10 years. It blew. I replaced it with a 9007 sylvania bulb. ...blew it in 4 days. Replaced it, same result. Never touched the biob with my fingers either. Any ideas why Im frying bulbs? Sealed in nicely, no water intrusion. ....hasn't rained either. Perfect weather. Any ideas? Thx in advance. ..