I have been developing B/W film for the last 20 years, but just in the moment I am phasing out of the wet darkroom, all negatives come out very curly. A drag with my expensive scanner, which focus only on part of the negative. That was not the case before. I have tried developing only with bottled water, without success. Film is TriX, developer D-76. Very basic.
Thanks in advance for the tips.