I have been using my Ijoy Limitless RDTA mech mod and am having issues with delayed reaction time when firing. I am running a .25 ohm build, Limitless Gold RDTA, and KFALO IMR 18650 3000mah 35A battery firing at 4.01v. I have taken apart and cleaned all contact points, including 510 pin on tank and +/- on . The mech is a hybrid and just started being hesitant in firing. I have checked and double checked resistance and discharge voltage. Does anyone have any suggestions? When I checked the voltage, it was instantaneous when firing.