Here are some tips that ensure headlamp to work for a longer time. Its suggested to remove the batteries from headlamp before storing it/not going to use for a longer time. Regular cleaning of headlamp will let it function properly and look presentable. Simply remove the hardware from headband strap and remove batteries. Wash the band to clean the headlamp set and clean all its surfaces, simply use a cotton swab dipped in alcohol to wipe off all grime and dirt. To make the lens crystal clear, you have to apply a thick paste made from baking soda & water on the lens. Clean it with a soft rag and repeat it regularly.