I have the liquinator,3 ml tank from Vaporescence and I'm going through a carto a week. Is this normal for a heavy vaporer? I wet it with drops of liquid before using a new one like I was told to but they go so quickly I have to wonder if I am doing something wrong. Can I clean a punched slotted carto? When they go bad they start to get hard to pull on. I added some drops to top off the carto and then it just pulls liquid. Please help a noob girl out!