I was playing Counter-Strike.
My Frames per second would start above 100, then decay to 10.
My fan would overheat, this was due to a collection of dust.
I didn't know that at the time, but my friend recommended me to try this.
After all, in my previous home it had resided on the carpet.
So, I turned off the PC and left it, so that the CPU would cool.
And dusted all the fans. It blows it away brilliantly, and I used the end of the straw to scrape off the thick dust to blow it off.
All my fans were cleaned. I rebooted.
My FPS had risen well over 100 and stayed.
This airduster fixed my PC problem for a very humble price.
The dust was so thick that I had to scrape large parts off.
And because the air in the can has no moisture whatsoever, it is not harmful to the computer.