1. Check the condition of the wiper blades; if they are cracked or otherwise damaged, or if they scratch the glass, replace them. Regardless of condition, replace brushes annually.
2. Move the wiper arm away from the glass before installing it on the latch. Rotate the brush 90°, press the latch on the base of the attachment block.
3. Move the screen off the lever. Don't forget to check the condition of the rear window wiper (where it is installed).