Some camera phones have such tiny lenses that it's difficult even to see where the lens is. But take the time to find the lens on your camera phone. Try to blast dust off the lens with hand-squeeze dust blower. Attention: Compressed air shouldn't be used for this purpose because it can damage the lens by suddenly lowering its temperature.

Put a small drop of lens-cleaning fluid on the end of a piece of cloth or lens-cleaning paper. Lightly wipe the lens with the cloth or paper in a circular motion. Use gentle pressure, don't scrub, but let the fluid do the work. Attention: Always drip the fluid onto the cloth and then wipe the lens; never put fluid directly onto a lens.

Dry the lens with a fresh piece of cloth or lens-cleaning paper. You must use a proper lens cleaning cloth or paper. Cleaning fluid may cause some streaking across the lens if you use too much. One drop on your lens cleaning cloth in a gentle circular motion with a will get most marks off a lens.

The lens cleaning fluid is an alcohol-based fluid that is ideal because it’s not solely for dust but accidental finger prints and other unplanned smudges.