FunFlix RD-852 Mode D'emploi page 7

-The following parameters can be modified on the display page.
9. What Should I Do If There Are White Spots On The Projector?
If a white dot appears on the projection screen, it is likely that there is dust on the
projector lens or inside the projector.
-For dust on the outside of the projector lens, please wipe it gently with a paper
towel (do not use a wet paper towel)
-For dust inside the projector.