There are four possible scenarios:
Which one is proper?
Even super soft microfiber, chamois-leather etc. will act as fine-grain
sand paper if used more than once, or just while lying somewhere and
collecting dust particles.
Lenses I know
There I'll include some information about lenses I had chance to meet and work with :)
Manual lenses - fixed focal length
Fixed focal length lenses
VFL Lenses
Variable Focal Lenght Lenses - tranfocal and zoom