Hi, I'm pretty new to vaping. I have the Smoke 51 Duo and recently found out that I could refill the cartomizers instead of spending the $16 every time I wanted 5 new ones that didn't even last very long. I bought some Dekang Desert Ship liquid and followed the exact instructions from a Youtube video...I've researched and realized that the model 808D-2 battery is the one I have and I can buy empty carts from Lecig but I figured I'd try my Smoke 51 carts first. To clean, I took the white cap off the end of the cart, I ran water into it and allowed it to drip through a few times, then I ran water into it and I took a napkin and blew the water out and repeated this until the water was nice and clear instead of brown from the previous juice. Then, I held the cart at an angle and turned it slowly as I dropped 12 drops into the wick (Someone said to do 18-20, but this caused mine to be overly full and the wick was completely saturated). Then, I rolled the cart between my hands because they said it would help evenly spread the liquid. I allowed all the carts I refilled to sit overnight because one guy said you couldn't vape instantly and it was better to let them sit as long as possible. Next day, I try to vape...nothing happens. I hear the slight popping and crackling sound it normally makes when I vape but I get little to no vapor at all on some carts, then on other carts I get absolutely nothing and it feels like its clogged, even though I never dropped any liquid into the actual CENTER of the cart, only on the cotton on the sides, and then I puff harder and I just get a huge mouth full of liquid. I have ONE cart that I refilled that actually produces a little bit of vapor but not NEARLY what they produced as new, pre-filled carts. Am I doing something wrong? When I did 18-20 drops, it was too much, 10 wasn't enough, so I finally did 12 and one cart works decently but the rest don't work at all?? This makes no sense to me. So again, I have the 808D-2 battery from Smoke 51, using the Smoke 51 carts that came with it and refilling them and they don't work at all or produce little to no vapor at all. Any help would be appreciated...thanks!!!