Samsung Galaxy Camera 2 User Manual (en)

Cleaning the device
Use an optional 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.
Do not press on the lens cover, or use a blower brush on the lens cover.
Never use benzene, thinners, or alcohol to clean the device. These solutions can 
damage the camera or cause it to malfunction.