Just started making my own juice and after a few days with a brand new coil I start getting a burnt taste. I am using a Sigelei 150 with a Crown 2 tank and a .25 coil. I usually vape at 80 watts but turned it down to 60 and I get a few more days. My juice is 70/30 vg/pg and my nic is 3 pg. I get my flavoring from Rocking Drops and I believe it is water based. I am using the Ejuice me up calculator for my formula. Any help would be great,