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Cleaning the device
Use a blower brush to remove dust, and then wipe the lens gently with a soft cloth. If any dust
remains, apply lens cleaning liquid to a lens cleaning paper, and wipe gently.
Never use benzene, thinners, or alcohol to clean the device. These solutions can
damage the device or cause it to malfunction.
Do not press on the lens cover, or use a blower brush on the lens cover.