I have had some recent issues with more dust than usual on my 4x5 and 120. It was clearly on the negative. I have surmised that it was on the film before development or occurred during the drying process. I had just moved to hang my negatives in my walk-in safe area where the humidity level is ~45%. I thought this would help, but it might have made it worse. Will try a few other options. I heard it suggested hanging them in the shower. This would be a bit of a pain for me. Any suggestions?