Another few probabilities:-
1) Make sure to shake the glue solution well before pouring
2) Use new sponges and try not to recycle as used sponges may still have the previous glue residues
3) ASEAN weather tends to be much hotter than other parts of the world, thus even without wind or ventilation, the heat from the environment is sufficient to cause the glue to dry up faster. For the same reason, i tend to do this during night time when the weather is much cooler.
4) Having sufficient glue to spread to the whole blade. When poured too thinly and couple with the hotter weather, glue tends to dry faster.