(I posted the following as a response to a 3-year-old post, but I don't think anyone saw it, so here it is again.)

There is moisture / condensation in one of the 2 headlights. I recently had removed the plastic cap to try to replace a bulb.

Does anyone have a good idea as to how to fix this problem. Maybe remove the cap and let it air out, making sure that it is a nice and hot, dry day (and obviously not drive the car with the cap removed)? I assume the problem was that I didn't replace the cap properly, but maybe it was something else.

Thanks