Frequent headlight failure - 2000 Cavalier

I have a 2000 Cavalier (bought used in 2006). Everything has been working wonderfully, except that the passenger side headlight keeps dying. It was initially replaced by the dealer I bought it from and then I have replaced it a number of times myself. Has lasted for as long as a couple months and as short as a few weeks.

I have been careful when replacing not to get the bulb dirty, or touch it with my bare hands. Any suggestions? I really hate driving around with only one working headlight, but replacing it all of the time gets rather costly and is annoying.

Thank you for any help you can offer.

I apologize if this question has been asked before, I did search this forum and could not find any relevant posts.

Did you or the dealer check for any breaks or frays in the wiring harness. Maybe there is some moisture getting in there as well.

Besides replacing the bulb, I don't know if the dealer checked anything else. I will certainly take a look the next chance I get. I'll also have a look at the enclosure and check for cracks/leaks.

Thanks for the help. Hopefully I find something :)

Make sure the headlight assembly is not loose and vibrating driving down the road.

Look very closely at the connector, if it's even slightly melted, discolored or burnt, replace it. GM started skimping on the copper in the mid-to-late 90s, and sometimes just a couple broken strands will make the wire get hot enough to melt stuff around it (like a connector). If the plastic looks good, take a pick and bend the contacts in so they are tighter against the bulb, if they get bent too far out they can lose contact with the light bulb. Then someone sees the light isn't working and they install a new bulb (in the process moving the contacts/wires), and then it works for a bit.