Firstly make sure the wick is not too loose or too tight as stated above. and your wick channels should not be fully stuffed with the wick. Half way in the juice channel and also not too tight then you will get dry hits or too loose or your tank will leak. My very first RTA was the Crius V3 and...
Below is a picture of my coil(s) as installed without wicking.
Below is a picture of my build as wicked.
Twisted this wire myself. Not precoiled. I Twisted 2 Kanthal A1 26G wires together and Coiled it together with Clapton Wire III 32G. Did 5 wraps on 3mm comes out to 0.14 Ohm...
@Peterphile69 how tight is your wick ? I've found if it's too tight the liquid does not get soaked up enough in the cotton because there is too much cotton. I have experienced this with my crius when firt just got it. horrible taste !