I bought a brand new Minikin V2 at the end of last year but since yesterday something is not right. Every few hits the resistance on my TM2 starts creeping up from 0.17 to 0.2 to 0.32. The minikin then fires the build at extremely high wattage (still shows 75w on the screen). I have checked that my post screws are tight and that the 510 on my TM is tight. I also cleaned the minikin's 510. Does any one have any ideas what the problem might be?