Have 3 attys, used for 2-3 weeks heavy, one newer atty started tasting burnt, priming helped well but i wanted to solve the problem, dont like to prime because i lose juice in atty and it can also cause too much flooding. Just pushed wick in a little deeper, easy to screw up though, went deeper than i expected but it seems to have worked ! 6 hours of vaping and no more burnt taste. All 3 atty working good still, only cleaned by blowing out so far.