How can I improve the image quality?

• Try the following:
  • Turn the focus ring to adjust the focus.
  • Make sure the projector is at the correct distance from the screen. See Screen Size and Projection Distance.
  • Make sure the keystone adjustment value is not too large. Decrease the projection angle to reduce the amount of keystone correction. See Adjust the Image
  .
  • Clean the lens with a mild solvent and a soft dry cloth.
  • If condensation formed on the surface of the lens, turn the projector's power off and wait for the condensation to disappear.