I just started to use this 12+ yr old AC-225 box after many years hidden in storage.
At first the amperage switch rotated fine.
Lately it has gotten VERY hard to move to different settings....Now it won't move.
(Other than this problem...it was working GREAT!)
My questions are:
1) Can I clean or lube the contacts? If so, what product and how do I go about it?
2) I've tried to separate the cabinet in order to get to the switch but I'm afraid that I may loosen up a screw that I can't fasten back up....
Is there a trick in getting inside to the switch?
3) If I have to replace the switch, about how much does it cost?

Any help will be greatly appreciated!!
Thanks,
John