Whenever I mix dry ingredients, I use a small blender (Magic Bullet) with its smallest bowl (about a cup) to mix ingredients. Some ingredients clump badly, but this process turns all into a fine mixed powder. You might try putting the wet mass in an oven at a low temperature (~40/50 deg C say, as melting point is ~90 deg C) for a considerable time to remove as much water as possible before breaking it up into smaller pieces and using the blender. Then seal it in a jar with desiccant.
I just bought some powder, but haven't opened it yet. Thanks for the heads up, I'll be careful using it and try keeping it dry.
From Wikipedia...
"Many users report degradation of alpha-GPC when stored openly or for long periods of time. Alpha-GPC is hygroscopic and will pull moisture in from the surrounding air. This will cause the powder to turn into what appears to be a gel. Alpha-GPC with >99% purity will undergo this process at a visible rate (seconds to minutes) and thus requires minimized exposure to the air. This hygroscopic quality can cause gel capsules not fully packed with alpha-GPC to dissolve. Proper storage methods need to be used with alpha-GPC and include removing all air from the container, double bagging with plastic bags rated for chemicals (less likely to leak air), and storing bulk/excess inside the freezer. Vacuum sealed bags are highly recommended. For people accessing alpha-GPC daily it is advisable to separate a month's supply from excess and storing the excess as best as possible. Vacuum sealing a large supply into many 1 month dividends is a method positively reported by many users. It is important to note that hygroscopy is not degradation and leaves the substance still usable, however, the ability to accurately weigh a dose is no longer possible as the substance being weighed will be a mixture of powder and water. Liquefied or gelled alpha-GPC may also be indicative of poor storage and thus have an increased likelihood of actual degradation."