Yeah, cleaning the contacts and crimping them down was the first thing I tried last year. No idea why, but it didn't last very long. That's why I soldered it this time. 2 weeks so far. Not a single problem yet. Thanks PyroTek and the rest of you for posting your results!! I just have no clue why these contacts are such an issue. Most of the car's electrical are connected in a similar way. Now I'm worried!!