1. A brush can clean it, but it's a waste of time.
2. You can use a hair dryer to clean it, but you need to disassemble the computer. There are special hair dryers, you can check them at a computer repair shop. Of course, a household hairdryer is also available, but be careful to use cold air.
3. Pay attention to cleaning the fan area. Dust accumulation in the fan area can easily cause noise and affect the heat dissipation of the computer. Can be applied with a brush.
4. Use computer cleaning fluid to remove dust on the surface of the main chassis and monitor.