I bought a 5 pack and i keep them in rotation. Takes some maintaining but you could try boiling them for about 10 minutes. Let them dry for a bit then dry burn em to finish. I try to keep one drying and ready to go,
I really like this tank so the extra work to keep the heads working perfect are really worth it to me,
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For those who say they have no problems, where are you getting them from. I got mine from Discount vapors where I have purchased other items from with no issues on anything else. Actually great products at a great price and great service too. I try to read everything there is to read before I buy anything. Have to agree with some who give reviews way to fast, actually use it and the parts for it before you start raving which would help many of us. Have to say I have not tried boiling yet and have to agree with another post about they seem to work better at lower voltage of vv devices. Thanks for your replies I am speaking with David at discount vapors now who has asked me to send him links that I am reading about others having the same issue with the inconsistency of these heads.