Don’t Be Afraid to Vacuum Dust and Debris with a Soft Brush
If you have an appropriate small brush attachment for your vacuum cleaner, you can use it on your MacBook to eliminate any dirt, dust, or debris that may have accumulated between the keys or in the recessed hinge area.
Don’t be afraid to use a vacuum on your MacBook keyboard, but just make sure that you’re using a soft, smaller brush designed for more delicate surfaces — and of course, use a light touch.