This is a cigar... so it should have a reset-function, unless the Njoy is totaly different from all e-cigars I know.
First take out the cartridge with mouthpiece, so you can see down the tube.
When done, look at the bottom of the cilinder on the outside (look a bit above the end-cap (led) on the side of the cigar) for a tiny hole. Once you found it, take a paperclip and fold it open. Now put that paperclip through the hole (you don't need to push really.. or just very slightly at most). Now, while keeping the paperclip down inside the hole, move your hand with the paperclip to a side, so that the paperclip touches both the bottom underneath the small hole, AND the side of the hole at the same time.
Look into the tube while you are doing this. You should see, perhaps after waiting for a bit, how the mesh-bridge deep down in the tube will slowly start lighting up; soon followed by so much smoke you won't be able to see anything in there anymore if your cigar was clogged or near to that.
This is 'resetting the cigar'. Do it for about ten seconds, then stop to let it cool down a bit, then repeat. Keep on doing this until you see the lighting up inside pretty fast after you start resetting, plus there isn't so much smoke now anymore.
Then it's done and the cigar should smoke well again. Drop a few drops of liquid in, put in a new cartridge, let it soak for a few minutes, and off you go smoking if all went well.
Disclaimer: this resetting is sometimes known to have some risk of ending atomiser-life, so don't do it unless really needed (most of the times it goes fine though - just this is a bit of a risk - but then, what good is a badly clogged cigar anyhow..)
Better way I think myself, which makes resetting much less often needed, is: each and every time when you change cartridges, take out the old, put on a dummy mouthpiece, and go on smoking like that until there isn't much vapor anymore... only thén put in the new cartridge. This small 'springcleaning' inbetween each two cartridges makes for hardly any need for 'big springcleanups' (resetting) anymore.
(Oh and if you don't see any lighting up inside while resetting, then first just keep it up for a while; very very dirty cigar means nothing will light up for a while - but if even that doesn't help after a certain time, and the atomizer also stays cold, then guess it's spare-parts-time...)
Hope this helps
