I'm using Halo Tribeca (flavored with 12 mg/ml nic) with Triton 2 (with .75 ohm coils). It starts tasting/smelling nasty with just one day of use and I have to change the coil. I was wondering if I used unflavored eliquid instead (with nicotine, such as Halo Fusion series) would that make the coils "stay fresh" longer?
Yes, flavorings are what causes coils to gunk up. Some flavorings are worse than others and the more flavorings
(higher the percentage) in a juice the faster it will trash your coils. Many of the chemicals used to replicate natural flavors aren't stable at high temperatures
(they don't completely atomize) and slowly build up/caramelize on your coils. Sweeteners are a
major contributor toward coil buildup. I vape NETs exclusively, they're notoriously hard on wicks/coils. Unflavored juice is as clean as it gets but
only if it's actually flavor free, I'm unfamiliar with Halo's Fusion series but if it has any flavor at all it's not truly unflavored. Rather than avoiding flavors/juice that I enjoy I switched to using RBAs, -problem solved-. I can rebuild/maintain a dual coil RBA
for an entire year using the highest quality supplies available for what a single factory coil head costs. Unlike factory coil heads which are designed to be one-use disposables, RBAs are designed to be rebuilt and maintained regularly and doing so is quick/easy once you get the hang of it.