Clean
the projector's motion sensor periodically, or if you see a message
telling you to remove any obstacles that are interfering with the
projection area.
To remove dust or smudges, gently wipe the sensor
with lens-cleaning paper.
Warning: Do not
use a lens cleaner that contains flammable gas to clean the motion
sensor. The high heat generated by the projector may cause a
fire.
Caution:
Do not use glass cleaner or any harsh
materials to clean the motion sensor and do not subject it to any
impacts. Damage on the surface of the sensor may cause a
malfunction.