Always check the film out of the fix. The clear areas must be clear not cloudy and T Max will have a blue tint to the film. Proper washing will remove the blue tint IF THE FILM WAS FIXED PROPERLY. I find a soak works as well a agitated wash to remove the last of the tint if you do the Ilford wash sequence first.
Hypo fix which clears older film fine will not clear tab grain film like Delta or T Max. Use Rapid Fix without hardener or Photographers formulary TF4 alkaline fix. Both will work fine.
No amount of time with paper dilution fix of any kind will clear these film. You must use 1:4.