The best way to prevent dust on mobile phones1. Disassemble the phone screen. Gently lift one end of the screen along the phone screen with a small knife and slowly use a screwdriver to lift it. Use a small knife to clean the adhesive underneath. 2. Clean up the garbage inside the phone. Gently wipe the inner screen with a cotton swab soaked in alcohol and delve deep into the surrounding area to clean up as much garbage as possible. And placed in a dust-free environment. 3. Clean the external screen. Use a cotton swab soaked in alcohol to remove any garbage and adhesive on the outer screen. If it cannot be removed, try to scrape it off with a small knife and then use an alcohol cotton swab to clean it up..syi