I opened the PC case again. And then... I removed the entire CPU and graphics card along.
Then I removed the heatsink on the CPU. And put it under strong light.
The one thing I can say is... "Oh my. Oh my." Never before I have seen so much dust caked in - seems like blowing air on it just plain didn't work in the last few times.
So what's a plushie to do? Why, I decided to just physically remove the dust. With a toothpick. Same thing for the...