has anyone got any tips as to how to deal with these? Some of the pots
and rotary switches I come across seem (at first sight at any rate) to be
fully encased and consequently very difficult (and some) to get any
lubricant into. I reckon there must be some old trick or knack I'm not
familiar with. Is there any alternative to removing them outright and
soaking them or drilling tiny holes in the casings to squirt lube in
through?