How many 
coils do you use when you rebuild the vivi nova?    I usually use a syringe and wrap 5 coils around the wick and the needle.    It doesn't seem to matter how viscous the 
e-liquid is though, I have the V1 and I check it with a volt meter.    So I start at 3.v and start going up until I get decent vapor, but then I get dry hits.