Quick question - I want to go back to Rodinal for a few rolls of 35mm, so I was looking at my bottle yesterday, and I noticed what appears to be a clump of brown (lighter than the liquid, though) solid material at the bottom. I got some of the last Agfa product, so that should give you a clue as to its age. What is going on with it, and will this affect any development I try with it? Do I need to do anything to try and re-dissolve this material? Note: in an effort to de-clutter and 'neaten' my chemical storage area, I switched to putting everything in glass bottles. This bottle had not stored anything previously, however.