Why is the laser on my KS 120 Kapex dim and/or blurry when in use?

To remove and clean the laser window on the KS 120 firstly unscrew window holder screw 2-3 turns. Press front of window into machine to release the plastic tabs. Slide window out of head. Clean the window or replace if necessary.

See page 30 of the
KS 120 KAPEX manual for more information.