For Membrane or Mechanical Type

Unplug or turn off the keyboard.
Identify the key causing the issue (e.g., the 'Y' key), then gently pry up the key using a small, flat instrument (flat-head screwdriver) or your nail. Insert the tool or your nail under the edge of the keycap and carefully lift it up. Be gentle to avoid damaging the keycap or the switch.
Use the swab to clean any sticky areas on and around the key switch. Make sure to clean the underside of the keycap as well. If there is visible debris, use a dry cotton swab or compressed air to remove it before using the alcohol.
Reinsert the key back into its original place by gently pressing it down until it snaps back into place.
Check the keys to see if the issue is resolved.

Scissor type

1. Unplug or turn off the keyboard.
2. Hold the can of compressed air upright. Aim the nozzle at an angle under the keycap and use short bursts of air to dislodge any debris or dust. Be careful not to tilt the can too much to avoid propelling liquid.
3. Take a soft brush or a clean, dry toothbrush and gently brush around the keycap to loosen any remaining debris. You can also use a small handheld vacuum designed for electronics to suck up any loose particles.
4. If you have a manual pump blower (like those used for cleaning camera lenses), aim it at the base of the keycap and give several strong pumps to further dislodge any dust.
5. Dampen a microfiber cloth with a small amount of isopropyl alcohol (not dripping). Wipe the surface of the keycap and the surrounding area to remove any sticky residues or fingerprints.
6. Give the keycap area one more blast with compressed air to ensure all loosened debris is cleared away.
7. Check the keys to see if the issue is resolved.