Ok, i just filled a fresh blank with about 10 drops, shook it up, then added another 7 or 8 and shook it up again. Vapour production from the first hit off of it, with loads of flavour. I'm sold on the shaking method for now. Although i'm going to try the syringe method too.
phishtraveler: Try the shaking method. It seems to work. Vapour production was a million times better that way for me than all the other ways combined.