Hello..again I started off a couple of weeks ago with a DSE901, and I really liked it. Raved about the thing to my husband, who tried it. HE liked it so much he's pinched it! When I saw that was the way it was going to be, I ordered the RIVA510 from Liberty Flights. Goes fine, and I really have taken to the manual battery. My question is this. It came with blank cartridges, which I am filling with my favorites. A cartridge goes fine for a couple of hours, and then I start to notice there is a tiny little bead of juice on the mouthpiece with every draw. *ack* foul stuff when you taste it, yummy when you vape it...go figure! What am I doing wrong? I am sure it will be me.