Computer maintenance is always a mandatory thing, if your into gaming. 18+ rated account, your responsible for your own actions.
The dust in your computer can damage more than PCB, memory modules and can't be repaired if damaged. This is a thing you need to watch out for SCAM PC Tech videos that promote computer repair fraud, over sponsored people who read cue cards and off screens they're really just actors not techs.Notes.please Don't take apart PC's unless you have over 300+ hours of training..Learn.law.
CPU contact options to heat sink or cooling unit.( non-conductive thermal paste, can be safer than conductive, an alternative to paste is a graphite pad for your CPU's connection to the heat sink, or water block. Waring graphite pad can bond to CPU or cooler unit, risking damaging cpu pins if its an AMD or old thermal paste, slow prep work removal,can reduce risk of damage to hardware with manufacturer guides. (electrical math is very important) make sure you use correct adapters, trace wires,never over voltage a system.
( Refer to valid, credible sources for computer repair if your willing to learn.)
(Why risk hardware and your future) A trick for applying thermal paste, marking the cooling unit with an (X) corner to corner, to find an on-center measurement, do the same to a cutout of your CPU's size with wax paper, with the same dimensions, use masking tape to mark the parameters on the cooling unit, this is to prevent thermal paste overflow and can be removed later, the wax paper is for pressing and spreading the thermal paste on to the cooling unit, after applying a small amount of thermal paste, center the wax paper onto the unit and press it down softly on to a flat surface, so you do not make a mistake on the density of the spreading , place the cooling unit into a refrigerator(plastic wrap unit) for 15 mins or so before you remove the wax paper. you can also reduce the size of the applied paste parameters by 5mm smaller than your CPU to prevent paste over flow and still have efficient cooling.
I suggest blowing the dust out of PC's every month or two, always remember vacuum out your CPU socket, RAM slots, any slots that are not filled or filled component slots. I suggest anyone to replace Button battery 3 volt cr2032, every year or 2,3 or 10 based on model of the life span of a 3 volt battery depends on your climate and use, press Delete(or based on base board hotkey) key upon launched boot of PC system, set optimized defaults in bios, unless you have a custom system build with other compatible hardware, refer to manufactures settings guides and system build configuration specifications for custom settings based on your PC build to set booting parameters of installed hardware.
Always read every detail on the hardware you have at manufactures website and update from manufacture site, to prevent system hardware damage, when after new hardware is installed always make sure your Bio's is up-to-date for your PC build, not all updates can or will make your system run better. The best way to clean a board with not any air can be a( Brand new soft real hair, paint brush with a LED connected to the metal on the brush, to prevent Static electricity, and to remove any oil based dust from the board, that can have conductive materials, a non-harsh volatile all purpose cleaner can be used for corroded connecting points, and parts cleaning, some people use de-ionized water to clean boards with the right training after tear-down with other cleaning solutions(flux)(corrosion) .(waiting more than 24 hours to clean a powered down computer, can be a safer way to prevent damage during cleaning because of electrostatic charged components on boards still holding a charge, larger computers can still hold charges for weeks or months, (like industrial large scale computer systems/Ground-breaker-switch)