Desert vape = sweet. Higher sugars and darker juices will gunk up the coil pretty fast. I have an iClear 30 filled with a mix of Dutch Chocolate Mint and Chocolate Fudge Brownie. Makes for a nice fudgie, minty vape, but absolutely destroys coils. I have to do a rinse and dry burn at least every other tank, and I really should probably do it for every tank, but I'm lazy..... At the same time, I have some lighter fruit mixes that have gone through at least 7 or 8 tanks with no issues. I have cranked up the voltage a bit on those, but flavor and vapor are still pretty good! Maintenance is key. But as I type this, I think about the one tank I have neglected the most, yet it just won't give up!!! My first iClear 16... I've put about 60ml of Fireball through that thing with only 1 cleaning/dry burn. It's been 4 months now! The tank is yellowed and the bottom of the tip has deformed and mushroomed out a bit from the harsh juice, but that baby keeps on kickin'!!!!! I'm almost afraid to clean it again because it has gone on and on for so long!