[sdiy] Waldorf MW2 encoder problem, any advice?

[cs e]

My Waldorf Microwave 2 has some problems with its 4 pots?/encoders?
(not the big red dial).  I have to turn a knob *many* times to get it
to go to the value I want; it skips/jumps, etc - backwards and
forwards seemingly at random.

I'd like to open it up and fix the problem, but I just wanted to ask
around to see if anyone has any recommendations/experience with the
MW2 or problems of this nature in general.

Thanks