I have the very same issue... for over a year now....mine doesn't do it all the time,it will go a month no problem,then two times a day..beat on dash, open driverside door count to 5 close door, or just wait and all will work in appx 5 minues...I/ve heard everything from windshild leaking,VCM,bad ground,bad switsh..The only thing i haven't done yet is change the VCM..At this point I just want it to fail so I can find the problem