Also, check to see if you have flooded the cartridge and it has dripped into the screw well of the battery - my terminology is off, but check to see if there is juice in the well where your cartridge/clearo/carto screws into.
When a newly charged eGo battery stops working when I am vaping, I just unscrew the battery and check to see if it got flooded. I dip a Q-tip in alcohol and clean it out, then use the other side of the Q-tip to dry it. I have 2 DC tanks that are always flooding and I have to clean juice out of my battery repeatedly. I also BLOW, BLOW, BLOW out the tank and liquid comes out, but they may still leak on me even after I blow them out. I don't know if this is because I am overfilling, if I tilted the tank and got juice in the carto, or what, but it only happens with these two. I have no leaking with my Valley View Vapes tanks and I have used them longer.