You must ensure it saturates, prime it, soak it. If you can see the cotton anywhere through holes in the atomizer, push liquid in there too… because if it doesn’t get saturated, it won’t wick.
It’s also good when assembled to take a few “dry” puffs without firing.
It doesn’t make a sound, burnt taste - the liquid didn’t reach the coil properly.
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I haven’t loosened it yet, but I’ve blown through it now and it seems fine. When the tank is empty, I’ll take out the atomizer and loosen it a little.
I also noticed there were no bubbles, so it really wasn’t getting enough air. Now that I’ve blown through it, I see bubbles and could easily puff more properly.
You’re very kind @Peva71, thanks!
Thanks everyone! 
Edit.: The setting couldn’t have gone wrong, because when I change the atomizer, I completely turn off the mod, and it’s always locked when I use it.
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So, was it finally resolved? I just ordered a tank like this from A&L, for the Vinci Spark 100 mod. I hope it wasn’t unnecessary.
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Hi!
The question wasn’t directed at me, I guess they will answer too, but even if one is possibly faulty, the others are still good 
I have two, I’ve been using them regularly for months and have no problems with them.
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Hi. That’s great, glad to hear it!
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Yes, indeed! It’s been working fine since then.
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Glad to hear it, enjoy it! 
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