Ok, I'm a noob and am likely making mistakes. Have some tanks and cartos I bought from the local JucyVapes store in Volo Illinois (nice to be able to walk in and buy things!). For a week now, I've been rotating a couple DC size tanks/cartos on my LT and things have been working pretty well. Today, I decided to change the carto on one of the tanks and couldn't get a decent hit from it to save my life. Didn't seem flooded (no juice in my mouth, just very little vapor and very dry. I did prime the carto with about 10 drops and dry hit it several time. Thought maybe I simply had a bad carto so I tried another new one. Same problem! Went back to the old carto and get good hits again. Did I do something wrong or possibly got two bad cartos in a row? Beginning to lose confidence in the tank/cart system. Recommendations???