I am wondering about lifespan. I bought a pack of 0.7ohm coils, i vape pg 60, vg 40 with ~4% menthol aroma. As it's a thinner juice the coil should not have absorption issues. I do not have any leak issues. I vape up to ~5ml on a day. I would vape at 21w. After ~24 hours the coil starts to taste burnt.
Would that be considered a normal lifespan for this coil?
Yes they're genuine. It's an iStick Pico which i have used for well over a year now. I have vaped menthol for over a year, i have used ~50/50 60/40 bases for over a year. Not much has changed besides the past month where my coils started going bad very fast. I don't drink coke.
The coil was unvapeable, so i changed it and disassembled it to see if i could spot the fault. Around the coil there's 4 sheets, the two near the coil had holes in them as shown on the picture.
Now, i am not entirely sure what the holes are. They don't look like burn holes as i would expect to see burn marks, also because i prime the coils what i would consider fairly well.
I drip ~4 drops into the middle, fill the tank, let it sit, mount lid, let it sit for another few min, suck air through the tank 4/5 times and a few times covering the air holes without using power. Lastly i put the tank upside down to empty whatever excess out from the bottom, adding a little air from the mouthpiece. Then i let it sit for another few min before i vape on it, i start at low wattage in short burst around ~15w before going up.
Burn holes also don't really make sense with a 60/40 mixture at 21w, that should be well within the coils capabilities considering the low VG in the bases i use.
Unless these sheets are a new wick design which seems to not work very well for me.
But does dry burning makes sense with a base that's 60% PG?
My puffs are ~2/3secs. How long/short between puffs do you consider chain?
Also, the wick on mine seems very different from what can only be other versions.
Just wanted to add that the new coil has also started to go bad, this one has only been vaped at 16w.
So now i have no doubt that the others were faulty in some way. What to do about i have no idea.