Welcome back
LOL, it's all relative. Dry lubrication is stuff like graphite
powder. A lubrication used in electrical systems that doesn't run
or leave a residue. My guess is that your plastic is literally
"melting". Maybe from a bad batch, maybe from your humidity? maybe
it was exposed to a corrosive liquid? In any case we have 3 choices.
1/ Hope a dry lubricant is enough to free it.
2/ Cut away a tiny section where the 2 parts meet ie remove the
"bad" plastic. May need to disassemble it unfortunately.
3/ Replace the dial. Either get a price from your local agent or
send it to me. I have mode dials in stock.
The part is quite cheap, approx us$20.
Try #1 first. Ask an electical / electronic supplier if thay have
dry lubricant. You then rub it in between the moving part as you
hold it upside down (so that the excess doesn't fall through
inside) while constantly moving the switch back and forth. IF the
dry stuff doesn't work, we'll need to find a "gel" type. Even
vaseline is a good start. NO oil or "benzol" based ones as they'll
eat the plastic. The point is, if lubricant fails, we have to open
up !! See what you think and report back
JKirk