cleaning - Clean thermal paste from touch contact points on the underside of the CPU - Super User
Nab Cooling - How to Remove Thermal Paste? Start by unplugging all the wires from the CPU. Remove the heatsink and clean the vents and other parts that have dust in them.
How to Apply Thermal Paste - Intel
How To Remove Thermal Paste From a CPU | Tom's Hardware
How to Clean Thermal Paste off CPU [2023 Beginner Guide] — Kooling Monster