Having a consistant problem with the wicking of my VV Pyro V2. After a short time the flavour gets muted, about 2-3ml of juice. When I inspect the wicking, i find what a section, of cotton, right in the middle of the coil is gone. The ends aren't burnt the cotton just vanishes. This has happened with SS Kanthal and Ni80 coils. I'm vaping about 45- 50w with both fused claptons and flatwire aliens. What am i missing?