See also:

Replacing the batteries
CAUTION When handling batteries, avoid touching their contact surfaces as this could result in poor battery function in the remote key. 3 Note the position of the battery's (+) or (–) sides. ...

Cleaning the BLIS camera lenses
In order to function optimally, the BLIS camera lenses must be kept clean. They can be wiped clean with a soft cloth or wet sponge. CAUTION • Clean the lenses carefully to avoid scratching. • ...

Maintenance
• Use a screw driver to open the caps or cover and a flashlight to inspect the level. • If necessary, add distilled water. The level should never be above the indicator. • The fluid level should ...