I bought a shit load of coils when they first came out, perhaps the quality has dwindled since.
Holy crap? How are you vaping this mate?
My v8-T8 coils last on average 5 weeks and I vape pretty heavily between 105-120w (one went for 2 months!)
I found a couple of things help me ....just the ohmmmmm ritual I go through before using so don't take this as trying to teach you how to suck eggs here
1) Get a pin and pin 3 holes up each cotton piece around the coil, (there is a shitload of tight cotton in there this helps)
2) do same thing on top of the coil (try to not push cotton between coil rings (done this a few times it's a pain in the ass to get back out)
3) sort that rubber seal ring out at the bottom...I grab a really thin screwdriver and push the wires back (gently) so there is a snug fit when pushing down (by hand) on bottom of the coil
4) prime that sucker right up but don't just stick straight into your tank...nope, you need to do this a week before use, or 2 (unless you forget like I did last time)
5) grab some cling film wrap your primed coil up snug then leave it soaking up all that goodness for at least a week
6) insert into tank checking it's still absolutely saturated load up tank like normal
7) start at a lower wattage. I mean like 70w on the T8-V8 work up slowly (I count 10 tokes see if I'm getting bubbles, increment by 10 each time up to where I want it)
not only will this get you through that god awful shit taste bit when breaking it in but you get it to last a little longer too