I have been vaping unicorn blood as my all day vape for a while now. When I fill the bottle, basically daily, I have to rewick. By the time my bottle is getting low the juice starts getting dark. Is this normal? It seems like I have to rewick quite a bit. Maybe it's just unicorn blood gums it up quick?? I am using a 6 wrap 28g kanthal coil at about .85 ohms with rolled cotton wick.
I've been noticing the same thing since loading my reo up with bobas bounty. It gunks the coils up faster and with the juice squonking up to the atty and excess being sucked back into the bottle, some of that gunk will get backwashed into the bottle.
May be the same thing you're experiencing, but I've never tried unicorn blood. Unicorn poop, yes... but never the blood.