Have you tried Deoxit or WD40 Specialist Electrical Contact Cleaner to clean a dusty PC? I saw another YouTuber use Brake Cleaner to clean a dusty PC....
I went a little long between cleanings and a can of Air Duster and the old Air Compressor isn't able to do the job. I wasn't sure where to post this but since I would be applying chemicals on the MOBO PCB, GPU, PSU, cooling fans, and other electrical components doesn't sound safe. I trust isopropyl alcohol to an extent.