>>107051125
>turn off every possible app so that your CPU and GPU usage is as low as possible (like 1-5 percent in task manager)
>quickly stick toothpicks in all fans so they stop spinning
>spend 1-2 minutes using compressed air to blow all the dust out
>quickly remove toothpicks so the fans can spin again
Hopefully your PC won't overheat in the short amount of time.