one day this past summer, i turned on my wipers, and they worked so slow, i thought i would get old and die before they returned to there park position. they worked so slow, i thought they werent working at all, until a 1/2 hour later, when they were half way up my windshield. i dumped a little cofee on the linkage, and they didn't speed up any. and thats the truth, well almost. any ideas why they work so slow? thanks for a great site here.