so my build is a 1.7 ohm singe micro coil about 8 or 9 wraps of 28g kanthal on a 2mm screwdriver running at 3.7v about 8 watts in a magma rda on a provari. not a clone magma, ive washed every component ive boiled my cotton my juice tastes fine in my nautilus. ive made sure the wick is not to tight and not loose. i torched my tweezers to make sure there's nothing left behind on my coils but every time i make a build this harsh chemical or metallic taste and harsh hit just burns my nostrils, i cant figure it out usually this happens right off the bat but this last time the first try was perfect but the chemical came back after a day of use and re-wicking the same coil. so i always dry burn before wicking but this time after stripping the second wick off and after dry burnin all the juice off i kept re-firing my device and noticed that there was a harsh nasty smoke comin out of the neg and positive posts what is this, and sometimes it goes away and vapes fine please help in any way.