The lid on my Hansa metal development tank is stuck and simply refuses to come off.
I've tried to heat the lid in very hot water, hoping it would expand just that tiny bit that would have it slip off the tank, but had no luck. Cooling the lower part did not help either.
I've also tried wrangling the two parts from each other by brute force. I also tried the opposite - trying to pull them apart with as little force as possible.
Any suggestions what to do?