Anyone notice that with the ViVi Nova after a few refills they start to have dry hits. I found if I remove the top silicone cap and metal thingy it burns great and the flavor is wonderful. All I can see is the silicon cap appears to distort and touch the wicks after a while. I tried to cut notches in the silicon cap but that did not help much. It works great without the cap. I don't carry it in my pocet or turn it upside down so I don't worry about it leaking. Is there a better fix for this issue?