Most photography stores stock lens cleaning cloth's and solution for cleaning lenses. Just don't be to anal about getting it perfect.
You'll end up doing more harm than good. For the most part a little accumulation of dust won't be evident on the screen. Lens brushes do a great job of getting what needs to be removed off without damaging any lens color corrective coating.
Klear Screen is a harder to get here in Australia, but within the USA, you can get it at Fry's or via Meridrew Enterprises' mail order service.
The "KS-2 Starter Kit" with a 2 oz pump spray bottle and aero-space grade rayon cleaning cloths sells via mail order for US$9.95 (+tax/shipping).
The label on the bottle says that it is a "Laptop and Computer Screen Cleaner", but the fine print on the label specifically states that it is suitable for cleaning video projector lenses, CD's, laserdiscs, and DVD's.
Klear Screen's parent company packages the same product for Mitsubishi as a dedicated video projector lens cleaner for their own line of projectors.
The Klear Screen cleaner/cloth combination is used by both CNN and ESPN in the US for cleaning their "broadcast-grade" camcorder optics.
I have found that it is also great to clean the screen of my Pronto.
walmart carries endust for electronics anti static wipes. these work perfect clean with the wipe then dry with toilet paper or a paper towel. these also work great to clean cigarette tar off of it. i got my tv from a night club so it was filled with tar.
This is a "standard" optics cleaning solution. I've been using it for years. It can be sprayed on and wiped off with a microfiber cloth, but be extremely careful if you do this that you don't let liquid run into the lens elements. Better to spray the cloth if you are not sure.
Over here we can buy special tissues for cleaning PC monitors.
It leaves no trail and does not attrack dust.
I have used that on my G70.
The optics looked clean, and the picture was ok. But I thought why not ?
When I took the lenses off, the first think I noticed was dust (how did it come in there ?), the G70 has nice closed units. It was not much by the way.
Also the inside was very dull (hope I used the right word), in other words it did not glance. After some very carefull cleaning the lens became very shiny. After the assembly, I did notice a very very slight improvemend in light output, but I did found that the focus, especialy in the outer edges) was better (after refocussing).
I purchased the G70 some 3 years ago, and never got to cleaning the lenses. Thought it was not necessary with this model.
I know that's what the manual says, but if you clean a dusty lens with a soft dry cloth you will probably scratch it. I developed my optics cleaning techniques for my telescopes, and carried them forward to projectors. Believe me when I say I've cleaned much more expensive optics than anything in a crt projector. Telescope optics are never cleaned "dry"! I don't even blow the dust off the lens surface of my refractor ($20k).
For the serious optics folks, there is one other product which is worth investigating: Opticlean. It's a polymer which is sprayed on, allowed to set, and then peeled off. It can be left on indefinitely for protection during storage or shipping. Not cheap, but fantastic for cleaning really difficult to clean optics, like the surface of a ccd array or solar filter...
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