How will I know when it's time to change the wick and or coil in the rba? Is bad taste an indicator? Dark color or what? I know it's a simple question, but I'm just curious. Having three REOs, and not able to vape at work, I probaly don't even go through 1-2 mil per device at night, if that much. Maybe I should just change wick and burn coil? One more question, please. How many wraps of 30 around a 16 bit drill are going to give me 1.1-1.3? Thanks guys!