First prepare the cleaning tools that need to be used: Mini broom, hair dryer, towel. The first is to slant the laptop and blow the surface of the keyboard with a hairdryer (the angle is blown from top to bottom) to remove all the dust from the keyboard.
The second is to clean the keyboard with a small brush. The prepared broom brushes the keyboard vertically in one direction, then brushes horizontally, and finally dust is removed. Then dry the ready towel (try not to drip, dry as far as possible), and then gently wipe it through the path that has just been cleaned with the brush and stick the dust away. Finally, blow the keyboard dry with the cold air of the blower.
The third method is to use the old toothbrush, gently along the keyboard crevice brush again, dust swept out and then wipe it with a towel.