Hi I have a og metal induction heater from lucid customs got it April 2019. I know every induction heater is different, but im surprised how clean my induction stays thr glass tube protecting the coil has no residue. The only thing that had residue was the silicone activation button in the tube. I was able to clean this up with a pipe cleaner qtip toothpick and paper towel easily very miminal residue too. I was just wondering if other heaters are more prone to get dirtier than others and also what is the best way to maintain and clean a heater so it lasts long term.