You can go to customer service, and they will clean it for free. If it is inconvenient, you can also open the back cover and clean it with a brush.

The method of cleaning notebook dust is as follows: firstly, use hard and thin things such as small needles and threads to pull up and down the notebook air outlet one by one, so that all the big dust attached to the notebook internal air outlet is dispersed, and then blow hard at the air outlet with your mouth (it is best to have an air pump, and of course you can also use a hair dryer at home). The method is to blow the small dust away from the radiator, and the dispersion becomes smaller. When the notebook is used normally, the scattered dust will be taken away by the radiator. For notebooks that have been used for less than one year, as long as you blow directly at the radiator with your mouth, you will find that the heat dissipation of the notebook will be improved immediately. We suggest that you do this once every one or two months after seeing this move, which can ensure that the ash will not block the radiator, and the radiator will always be on, so that the computer can dissipate heat well, which is more comfortable to use and can prolong its service life.