Although you did not state which size package you experienced the problem with it would be safe to say that it was the 1 liter size. Over the past year or so I have had to return 12 or more packages that one part had become "clumpy." I assume that the package had not be sealed by Kodak properly and moisture entered the package. I would guess that over half of the packages of the 1 liter size that I had purchased had to be returned. I have never had the problem with the 5 liter size and now purchase this size exclusively. Since discover Xtol about three years ago it is the only developer that I use. It works especially well with all three Ilford Delta films.(posted 8652 days ago)