My Beogram 4002 has developed a slight fault when I press STOP the arm doesn't always raise and the needle scrapes across the record for part of the way. Pressing the Cue button raises the arm, the arm raises at the end of a record properly and also If the power is disconnected - I read that it might be that the contacts under the finger plate need cleaning. If this is the case is it ok to use WD40 contact cleaner or should i get something like deoxit? OR is it likely to be some other fault - everything else works as it should.