I have been processing 4x5 tri-x sheet film in my jobo 2551 on a rotary base for over a year now. Things have worked perectly. All of the sudden, I am experiencing a problem: I am getting density and lack of density streaks along the long edges and more importantly, marking straight through the short length of the film. Does anyone know what this is caused by and how to troubleshoot it?

I have attached a sample image with red marks around the affected areas: http://neilkatzphoto.com/serge/PROBLEM.jpg.

Let me tell you what I have done already:

I have cleaned my tank and reals and all components with alcohol.

I presoak the film for 2 minutes.

I am using xtol 1:1 at 70 degrees (don't want to change this)

I use kodak liquid fixer for 5 minutes.

I use permawash for 2 minutes.

And I finally use lfn as a wetting agent.

I simply can't figure it out and it annoys me since I have changed NOTHING about the process (except maybe from a powder to liquid fixer) and it has gone wrong.

I appreciate your thoughts and please address the streaks coming across the short end over the issues of the edges that are in the reel. Again, I never had ANY problems, but the edges seem to be a more understandable issue.

Finally, please try to keep your answers in relatively laymen terms.

Best,
Serge