What should be done to clean night vision goggles?

Cleaning night vision goggles requires a careful approach to maintain the integrity of the lenses and the overall optical system. Gently brushing them off is the most appropriate method as it minimizes the risk of scratching the delicate surfaces of the lenses. A soft brush can effectively remove dust, dirt, or debris that may accumulate during use while avoiding potential damage that could occur from more aggressive cleaning methods.

Using a cloth to wipe the lenses, while common for other optical equipment, might lead to scratches if there's any grit present. Submerging the goggles in water poses a significant risk to their electronics and internal components, which could become damaged and render the equipment unusable. Additionally, chemical cleaners can contain solvents or abrasive agents that might degrade the coatings on the lenses. Therefore, the gentle brushing technique is the recommended cleaning practice to preserve the functionality and longevity of night vision goggles.