My wife and I both have the smoke tech single coil cartomizer/tank setup. I have heard people say that they got up to 2 weeks out of this setup before changing the carto. Both my wife and I go 3 days and then the draw gets hard. We both do different liquids, and I am not a heavy vapor. After about three days, I have to stick a small paper clip up the middle to unplug it. I have do do this about 3 times a day. My wife is a heavier vaper and hers gets plugged up solid. Lately she is replacing the carto every three days. Is this normal, is there something that can be done to prevent this. Thinking about switching to the ViVi Nova setup, will I have the same issues with that as well?