I have been having a problem with my wife's 2008 Toyota Highlander Hybrid. It is blowing headlamps every 3 or 4 months. Usually one at a time, so it is probably really 6 months of life per lamp before it blows. I have made sure not to touch the bulb glass, but that doesn't seem to affect the time to failure on the bulb. I have not been using electrical grease.
I guess I should go measure the lamp voltage. Has anyone heard of such a high failure rate on headlights before? Other than high voltage, are there any suggestions of things I should look at?