Hey guys- I got a Sigelei classic 90w from a friend a couple months ago that has a Kylin tank & I've been changing the wicks, but didn't know I was supposed to change the coils as frequently.. He never told me anything about that. A couple weeks ago, it suddenly stopped firing correctly. Taking twice as long as normal to make any clouds at all and tasting almost burnt. So I changed the coils and wick, the same way my friend had when I first got it and its still doing the same thing. Can anyone tell me what I'm doing wrong or what I need to do to fix it? I just bought a few new juices and seriously missing the nic! Thank you!!