Wait a few minutes after turning on the product. (Burning taste). I had a filling, on two occasions I "ve had some liquid on the fingers, it is not systematic. I vapote to 4.3 volts and my big supprise it was not useful to "suck on it like crazy for the smoke. After all clearomiseurs I tried I find it not bad, to see in time. But oddly the ce4 are in my opinion the ultimate in durability. The worst is the large capacity clearomiseur CE9 5ML, buy two, one replacement, has worked is no more than a day.