Scrub That Sucker Clean, Baby!
The real reason we are featuring lens cleaning products is that we have so many of them and you all need them. This town is full of dirty glass, as any day at our or repair counter will attest. The wise people have dirty filters on clean lenses and the foolish people have dirty lenses, but that is another tale - today it is the question of cleaning glass.
Firstly - do not get it dirty. Use a lens caps and keep your fingers out of the lens hood -and if you are subject to environments that are dusty, brush or blow it off the glass with a blower or a soft brush. If the environment includes oil, fingerprints, dog nose prints, or fragments of egg-salad sandwich with mayonnaise, you will have to go on to the active cleaning.
Look at the head and tail images. These products are all designed to get after those heavier contaminants. You'll see three packets of dry lens tissue - soft one-use paper that can be safely wiped over glass. I would recommend that you either use a commercial eyeglass spray cleaner to wet one of these, followed by a dry wipe with a second tissue, or resort to the good old el-cheapo alternative of one drop of washing-up liquid in a glass of distilled water. Do not use drinking alcohol to wipe over the glass surface, particularly do not use Midori or Advocaat.
A packet of these dry tissues are a good partner to a couple of the Hama Feuchtreinigungstuchen. Say that late at night and see what materialises in the dark....
If you are caught out in the field, away from the washing-up liquid, he best cleaners are the Hoodman Lens Cleanse packets. They are a wet then dry combo and can remove anything organic. Highly recommended by Ernest, the fussy technician.
Last on the list are the microfibre cloths - these are available from several manufacturers, including one with our shop logo emblazoned on it. Use them to keep the small bits of oily smear at bay - they can also be washed out when they become fouled.