How often should I clean and how often should I replace the coil? I'm just using the 1.2 ohm coil, not the rba. I upgraded from the iClear 30 that was a duel coil and their site recommended cleaning the tank and soaking the coil in hot water every 2-3 days and replacing the coil every 2-3 weeks. Is that kind of maintenance standard across the board or do these last longer? Just want to be sure I'm taking care of it properly. Thanks