I'm using a small Jobo tank and a constant inversion agitation (per the DF96 instructions). I follow the Ilford rinse method with tap water and a few drops of wetting agent. Hang, squeegee, dry. I'm pouring straight from the bottle into the funnel of the tank so it's only 5 or so seconds between pouring, securing the lid, and beginning agitation.
These were my 11th and 12th rolls on the same chemistry and although the bottle claims 16 before exhaustion, it's looking a little grimy. Could it be due to exhaustion?
Also, I washed the tank to remove any dust or dirt before processing. If it wasn't properly dried would residual water from my washing cause marks?
Point taken on the convenience! I plan on switching to separate developer and fixer once I can figure out what is causing these ugly marks.
Thanks for your input!