4 Ways to Keep Dust Out of Your MacBook Air Keyboard
Regarding the MacBook Air: 1. Avoid eating over your laptop Crumbs and dust are the main culprits. Keep food and drinks away from your keyboard.
Store it in a sleeve when not in use A sleeve prevents dust from settling on the keys while the laptop is in your bag or on a desk.
Use compressed air every couple weeks Aim the straw at an angle to push dust out, not deeper in. A soft brush works for crumbs stuck around keys.
Skip keyboard covers They trap heat and can leave marks on the screen when you close the lid. Not worth the risk.