If you do try hide glue again Ross, I find that a
squeeze bottle works great. I put the granules and water in there, then throw it in the fridge overnight to “bloom.” Next day, it comes out and sits in a little
lunch warmer to warm up, and then I use it straight out of the bottle. I make it hot-maple-syrup runny, which is a little thinner than most people do, but again, desert, so things dry out fast. And runny glue means I can brush it smooth before it starts setting up, especially if I’ve pre-warmed the pieces it’s going on (by setting them out in the sun for a few minutes while I get my poop in a group).
When I’m done with it for the day, unplug the warmer and pop the squeeze bottle back in the fridge until next time I need it. I generally use it up before it goes bad, but once in a while it starts growing and I just toss it and make a new batch. That usually happens after I’ve gone a few months without using the glue.