That's weird. My last SS coil lasted at least 6 months with weekly wick changes and cleanings including dry burns. I just use simple 26ga single strand round wire though. Really it still "worked" when I replaced it, but performance was degrading. Also there are a lot of different SS types, I specifically use SS316L. Maybe that could be a difference.
No, I use 316L. I know the coil would continue to
work indefinitely, and many use a coil for months. It's just that I can taste the difference after a dry burn. Tried it many times when I first started, and recently tried it again a few times. I'm about to rebuild one now that dry fired last week. If you look at a new coil magnified vs. a dry fired one, you can see the surface is nowhere near as smooth. So if I inspect a new coil after 3
tanks, the coil looks
much cleaner than a dry fired coil after 3 tanks. The taste difference is kind of minor at first, but I think at lower wattages (8.5W @ .58ohm), the effect is magnified compared to high wattage, high volume
vaping. If I used anything exotic, I'd probably dry fire, but I make a dozen simple coils at a time in a couple of minutes, so no biggie.
But back to the original topic, I think you nailed it. I'm sure a big part of her problem was vaping it dry, trying to use all the juice. I didn't really think about exposing the coil to air, but was thinking like emptying your gas tank in your car, you're getting down to the bottom where all the total dissolved solids are. Either way, it can't be good for a coil. She's bound to get better results now.
