seems strange but this last pack of coils I bought for my TFV4 micro are just poor. half of them aren't fully packed with cotton so there is visble gaps/pockets where the cotton isn't really in contact with the wires. Anyways they're shitting the bed too soon. Not from gunk and use but they're getting "burnt out" and hitting harshly I have had to swap at least two or three of the five wayyy before their time. It's annoying and a bit of a rip off. Is it possible I just got a bad pack or is smok's manufacturing standards dropped? I may have had the same problem with other packs in the past.