Just got mine with a Tron tank, currently using Nickel200 coil. Setting is 450-500 for temp and 75 for wattage. Anyway, it seems that I need to constantly to remove the drop tip and drop some e-juice into atomizer coil, otherwise there's no vapor production at all or I have to draw very hard. I have tried lower the wattage and temp. Nothing change, and after I drop some e-juice, I can get a good 10-15 puffs before the vapor production went out again. What did I do wrong?