As Dick says, drain it into the wood dust, mix it up and then store in a sealed container (like a 60 litre drum or such like). Once the sawdust is mixed in, for some reason it never seems to set solidly. I don't entirely know why but I have found it loads of times.
A lot of things dont mix with glyc overly well unfortunately. Methanol does but it's not cheap or inert and if you are going to do that, you may as well give up demething.
Water does too, but, as we discussed by U2U, it doesn't burn.