Hi everyone I'm new so I hope this works.
I have found over recent times that Kodak has changed something on TMAX both 100 or 400. It looks grainy and dirty it's as though the fixer wont clear the film properly. I have done tests using FP4 and have eliminated chemicals being exhausted or contaminated. I was using Tmax developer and Ilfordtech. There did not seem a difference.
Regards
Rolf