For some reason, my TC coils in tanks don't gunk as fast. Maybe it is because the coil is constantly moist from
juice in the tank? My tank TC coils usually last me from a minimum of a week (if I am heavily using the one tank to the tune of 10 ml a day) to several weeks. In fact, I had this one coil (Vaporshark ni200 coil in an Atlantis 2) that I was
vaping one particular juice in that I had only replaced at the beginning month after using it for over 4 months and
vaping over 150 ml of juice with it, and started to notice a change in the taste.