So i got my varitube x from ivape and so far i love it! But today i started having an odd problem all of a sudden it started reading every carto atty and tank as 0.0 ohms and when i fire it the screen reads "Lo" but it still seems to fire fine. I dont have a dvm to measure the voltage to see if its right but it vapes at different voltages just like it did before. My question is should it be fine? Or is it a possible sign of a bigger problem? Should i try to get it replaced?