Just got my 3.5ml tank in today using it on an xl vtkd manual batt. it's vaping like a champ. so far i absolutely love it but what has me a bit concerned is whenever i remove the drip tip and look at the polyfill of the carto it looks bone dry. i thought the liquid was supposed to keep the carto completely saturated. is this normal? does it only saturate the bottom section of the carto where the "punches" are?