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on the doors... try some syl-glyde lubricant on the weatherstipping, its a weatherstripping, o-ring assemby, and rubber lubricant. It conditions the rubber and it will probably help out.
the windshield wiper nozzle... mine have clogged up pretty bad before and I sprayed the water hose at the nozzle real close and it helped but if could blow air from an air compressor it will work better.