I have the subtank plus and have bee running the .5 occ coils for out and about , I have found a few odd things and wondered if anyone else has the same issues , I run the coils on my eleaf 50w istick or my newly purchased cool fire IV , when I install a new coil I fluff the cotton and usually run a push pin all the way through both sides for wicking issues and this works great for me , but my question/ issue is I can run the coils at 25-30 watts for 3-5 days on premium juice (high vg) fruity type flavors and then get a burn tasting hit , coils are wet and thoroughly saturated but still get burnt after flavor . When this happens I drop my watts to 19 and get another 3-4 days of full flavor hits with no burnt taste at all , after this I replace the coil , I have tried rewicking g and rebuilding and have good and bad results going both ways . Anyways I am rambling now ..... has anyone else had this issue or know of anyone with similar issues ....? On a side note my own diy juice mixed at 85vg-15pg with 15% fart flavors always seems to give me a couple more days on the coils both ways , don't know what it means but could use some pointers here to make my coils last longer if possible !