Casio XJ-V1 Setup Manual page 13

Precaution when Handling the Projector after Use
The projector's exhaust vents and the area around the vents
become very hot during operation, and will still be hot immediately
after turning off the projector. Because of this, you should hold the
sides of the projector as shown in the illustration whenever
moving it.
Cleaning the Projector
Periodically clean the projector exterior, lens, intake vents, and exhaust vents on a regular basis.
When cleaning the lens, do not apply undue force and take care to avoid damaging it.
Dust and dirt tend to collect around the intake vents. Because of this, you should use a vacuum
cleaner to clean away accumulated dust and dirt periodically (about once a month).
Continued use of the projector after dust has accumulated around the intake vents can cause
overheating of internal components and lead to malfunction.
Certain operating conditions also can cause dirt and dust to accumulate around the projector's
exhaust vents. If this happens, use the same procedure as that described above to clean the exhaust
vents.
EN-11
Operating Precautions