So. I've recently bought an Isub apex tank with a cool fire IV plus. I love both the mod and tank.. However I've been using each coil I have for a around 3 days then starts to develop some weird taste and nothing like the liquid I put in. Not burnt just a kind of wood like taste I guess is the best way to describe it? I've been using the mod on around 30. And thought it might be too much so now I've been using it on around 25watts. The coils I've been using have been 0.2ohm and says on package can handle up to 20-50 watts. I'm an experienced vapor but this is really confusing me.. I've been doing everything right.. priming the coils waiting 30min before use etc. The liquid is also fine as I'm using some real good thick liquid was was actually made for mods like mine. So I'm real confused. I've tried everything so please help. I don't want to have to put new coils in every week 