While this does not disinfect your phone, the best way to keep your phone clean is to wipe it thoroughly with a dry soft cloth. Avoid abrasive cloths, including paper towels and other materials with rough surfaces.
If the screen gets drops of liquid on it, wipe it with a clean, dry cloth.
To disinfect your phone:
It is okay to use wipes or cloths moistened with 70% isopropyl alcohol or Clorox® Disinfecting Wipes to gently wipe your screen.
When disinfecting or cleaning your phone, turn it off and avoid getting any moisture in its openings, including the charging port, headphone jack, microphones and speakers.
Don't submerge your phone in any cleaning agents, avoid using any cleaners with bleach or abrasives, and avoid spraying cleaners directly on the screen.