I have days like that, yesterday I though my eVic was going on the fritz, couldn't figure it out, switched tanks a few times...I went back to simple, twist/spinner with a mini davide and found my spot for a day+ then went back, all is good, finding my favorite vapes are dripping wih my 357, or a mini davide on ego threads, the 510s not so much, so instead of buying a mod, chi u clone thing, gonna get some 1300 fat batts...KISS format works best...