Originally Posted by jobrien

If you're not blowing fuses, I cannot guess exactly what it might be unless you're using some kind of funky bulb that doesn't work with your car.

The other thing I can suggest is for you to remember NOT to touch the bare bulb with your fingers or hand, etc. The oils from your skin can cause the bulbs to burst. But if they are just going out and not blowing up on you, then that's not it either.