this is the fan out of a 2011 iMac. see how it’s never been cleaned in its entire life? that’s because you have to remove the motherboard to get to it. this would be the motherboard whose screws are all painted white and say WARRANTY VOID IF REMOVED on them.
that’s right, if you want to clean the fan of your computer that gets hot enough to function as a small space heater if it’s not running at full efficiency, you need to void your warranty. there’s a reason my family’s two iMacs both (this is #2) became unusable because they essentially melted from the inside
“Planned obsolescence is a myth”