A fuzzy or blurry image is usually caused by focus or lens. You can try the following solutions.
Firstly, you can try to adjust the image focus.
Then, you need to clean the projector lens. To avoid condensation on the lens after bringing the projector in from a cold environment, let the projector warm up to room temperature before using it.
Position the projector close enough to the screen.
Position the projector so the keystone adjustment angle is not so wide that it distorts the image.
Turn on automatic keystone adjustment in the projector’s menus.
Adjust the Sharpness setting to improve image quality.
If you are projecting from a computer, press the Auto button on the remote control to automatically adjust the tracking and sync. If any bands or overall blurriness remain, display a uniformly patterned image on the screen and manually adjust the Tracking and Sync settings.
If you are projecting from a computer, try using a lower resolution or try to match the projector’s native resolution.