Tx for your response. I know I wasn't being too specific.
I kinda meant just the vape in general. Like, during the course of a factory
coils life it changes somewhat. I don't know how or why that happens. One day I'm like "wow, I should change this coil soon", a few hours later "wow, awesome vape!", lol.
I'm an unflavored user tho so maybe my focus is different. I imagine the typical vaper is just focused on flavor output whereas it's very noticeable to me when the vape is drier or wetter or whatever the heck it goes thru, lol.