Follow the procedure below to clean the LED head.
- Press and hold down
to turn the machine off.
- Open the top cover until it locks in the open position.
![Open top cover](/g/b/img/faqend/faq00002559_002/gb/en/37353/a3170_u_g015.gif)
- Wipe the windows of LED heads (1) with a dry, lint-free cloth. Be careful not to touch the windows of LED heads (1) with your fingers.
![Wipe LED head windows](/g/b/img/faqend/faq00002559_002/gb/en/37354/a3170_u_g024.gif)
- Close the top cover of the machine.
- Turn on the machine.