I'm noticing streaks at the top of my recent negs inbetween the holes. Examples I was a little scared since I thought it was my leica, but I developed a roll from the praktica and those have the same little streaks. These are only on the rolls I've developed with diafine. The difference is that my tank leaks a bit so I would put duct tape around the seal so that no chems came out during development with D-76, but with the diafine I don't need to do as much aggitation so I don't tape it shut. Could this be the problem?