Do this first
Shut down & unplug.
Use a soft, lint-free cloth.
Avoid spraying liquid directly on devices.
Screen & case
Lightly dampen cloth with water or 70% isopropyl alcohol.
Wipe gently; avoid ports/openings. (Apple & Microsoft allow 70% IPA on hard surfaces.) Apple Support+1
Keyboard & vents
Turn device upside-down; shake out debris.
Use short bursts of compressed air at an angle to clear keys/vents. (Vendors recommend gentle, controlled bursts.) Microsoft Support
Why this helps: Dust traps heat; cleaning improves cooling and lifespan.
Source:Apple cleaning guide: https://support.apple.com/en-us/HT204172Microsoft device care: https://support.microsoft.com/windows/clean-and-care-for-your-surface-or-pcDell cleaning/fan guidance: https://www.dell.com/support/kbdoc/en-ca/000176896