Using a mini nautilus. The older small hole coils would last me nearly 4 weeks vaping 3 Mls a day. These new larger hole coils ( think they have cotton instead of ceramic inside) are only lasting 4-5 days. They don't taste burnt or anything just don't work as well not as much vaper or throat hit and become sort of airy and a bit gurgley. Anyone else have same problem is there anything I can do ??