First off I just wanted to say I really enjoy my VaporKing. I started off with a 510 which was great but the novelty wore off after not being able to find a good filler method and having to drip so often. The flavor on the vk is great and very consistent. So Ive refilled about 3 cartos so far. Two of them were fine but on the 3rd one for some reason while washing them out the draw became fairly hard and it doesnt produce much vapor. Before I cleaned it the carto worked fine. I ran water through it and blew out the water to try and clean it, and since it had a hard draw I disassembled it and inserted a small long piece of plastic through the middle of it to clear out anything that might have gotten stuck. I was just wondering if there was anything else I could do to save it. Sorry about the long post, and thanks for your help.