The straighforward answer is treat the rear element the same as the front element.

The claims about the zone system are a bit bizarre.

I'll just move this onto Your Photos.

I like the images for architecture, but all the time would get a bit samey I think. For portraits of people I don't think it's flattering, although for some styles even then it could be the right approach. Maybe for Goth images?

Unless we investigate thoroughly each website we use, we can't really be sure whether deleted images are immediately deleted, or whether they are after an interval. Not ever would seem a bit wasteful of space.

I'm confident there's no ulterior motive, no-one is trying to use our images without permission. If anyone did post something really bad, then I guess the evidence remains, so don't do it solves that problem.

It's an audit trail so we can see what has happened and when. As for images, IT will reply to your report and sort it out with you.

It's intended to be an aid to adjusting overall brightness/contrast. I don't think what you suggest would be an easy way to adjust monitor colour. That's the realm of specialist products.

Using chemicals of any sort is a last resort and simple Kodak lens cleanher when necessary is at least aimed at the job and not as a multi-pupose clean-anything item. The spiel reminds me of those American ads on satellite TV for various miracle products - setting fire to car bonnets to prove how good a polish it, etc.

Microfibre cloth is all that should be needed, plus a drop of dampening with lens fluid if necessary. Fluids should be applied to the cloth, never directly to the lens surface.

Original post corrected to 8 months as requested.

eric20, I've removed your phone number, maybe a bit unwise to put that on a forum. Members can PM you, after which you will be able to reply to their PM.