Isopropyl alcohol and a toothbrush. Turn off power to the PC. Hold power button for a minute. Unplug and disassemble. Get one of those chemistry squirt bottles (google lab wash bottle) to put the alcohol in, squirt it on the place to clean, brush with the toothbrush. Repeat until at desired cleanliness. Then take canned air and spray out under all the parts. Allow to dry. It’s dry when you can spray under the big components and not get any alcohol out.
I used to assemble, test, repair, and clean PCBs of all shapes and sizes. That’s what we did when we had to spot clean a board after a repair.
The jankiest way I’ve cleaned a PCB was to run it through the dishwasher without detergent, then wash it down with RODI water to demineralize, then alcohol to displace the water. It works, but you gotta be damn sure that you’ve washed away any mineral deposits and given it plenty of time to dry.
First thing, admitting that you have a problem is the hardest step to take, so you’re already doing better than when I was in college suffering from burnout. 15 years later and I’m finally wrapping up my degree.
I’d figure out the sleep problems first medically if it were me. That one’s going to fuck you over even after college. Talk to a doctor and make sure everything’s good there. If that’s an isolated issue, then you need to tackle the self-discipline issue. I’d see how you feel after the sleep issue is fixed as to whether you need more medical help or not. Everything else could be exacerbated by the lack of a consistent sleep schedule.
You’ll want to be open with your parents and in the meantime ask for their assistance keeping you straight. Turns out, you can’t independently manage your life right now, so apologize to them and ask for them to help you get out of bed and going in the morning while you get yourself back on track.