Found and fixed one potential contributing factor for some of my recent issues today. There was a tiny near imperceptible leak in my low-budget experimental hardware store material dual-loop pc liquid cooling setup. I had been suspicious about it for a good while, cause the coolant levels had been very slowly dropping, losing like maybe a couple ml every month.

I recently did a little reservoir upgrade on it, swapping a crappy old box reservoir inside to a tall narrow cylindrical one on the outside, and due to this one being mounted on the outside of the case in plain sight, and its narrower volume, the slow level drop became much more visible. Anyway, the setup is basically filled with vehicle coolant, which lingers for ages hardly evaporating at all. There had been a small wide flat puddle of it in the bottom of the case. Took a while but I managed to find and fix the leak and so long it seems pretty stable and dry for now.

Wouldn't be my first experience with the nasty effects of coolant vapor exposure. My first (mom's) car sprung a small leak in the cabin air heater, which had been pushing fumes inside. For a good while it was just a nasty inconvenience cause it kept fogging up the windows with non-evaporating stuff that needed washing to come off, but just a couple weeks later I spontaneously out of nowhere got the biggest nosebleed I had ever seen and connected the dots. And this time its source had been microdosing me in my own bedroom, probably doing to my brain what the fumes had been doing to the windows of that car back then. fogy...