Strange wurlitzer 2610 problem..

Hello group..
Got a gremlin in my Juke and don't know where to look..Normally it plays
fine, but every so often, just as the record sets, there is a buzzing sound,
and a "relay trying to engage" sound the comes from inside and the record
slows down, and sometimes rejects, or sometimes it will correct itself and
play normally...Almost sounds like a short in the eject button, but when I
push and hold the reject button the record just rejects, it doesn't make
that buzzing sound and the record doesn't slow down..Does it sound like a
dirty contact someplace?? Of course it never does it when I have the back
off, trying to find it..Always during a party or such...
Thanks so much!!! John