What is the difference between deerskin and lens cloth?

Suede is used for cleaning photographic equipment, not deerskin.

Suede is the skin of a deer, which is soft and does not have tiny fibers falling off. It is suitable for cleaning photographic equipment, and it has also been used to clean lenses in the past.

non-woven fabrics are generally used for lens cloth, which is also intended to reduce fiber shedding.

Generally, the lens does not need to be cleaned frequently, even a little stain will not affect the imaging.

When cleaning is really necessary, it is recommended to use special lens paper and draw a circle from the inside out. If it doesn't work again, a new paper should be used.