Dave, I've used a sable brush and a micro-fiber cloth for years to clean lenses. Zeiss, among others, sell them and they work. If you are worried about a micro-fiber cloth damaging your lenses, here is a quote from the M8 Instruction manual, page 126: > For lenses > • Normally, a soft hair brush is sufficient to remove > dust from the outer lens elements. However, in case > of more stubborn dirt, they can be carefully cleaned > with a very clean, soft cloth that is completely free > of foreign matter, using circular motions from the > inside to the outside. We recommend micro-fiber > cloths (available from photographic and optical specialists) > that are stored in a protective container > and can be washed at temperatures of up to 40°C > (without fabric softener, never iron!). Cloths for > cleaning glasses, which are impregnated with chemicals, > should not be used as they can damage the > lens glass. If that doesn't do the job, I use a drop of what my Leica dealer uses on his Leica lenses: ROR Lens Cleaner. ROR stands for Residual Oil Remover. See http://www.ror.net/ All the best, Bill On Jan 15, 2010, at 7:03 PM, David Simms wrote: > hello everyone; > A few years ago I had learned a Leica-approved formula for lens cleaning > fluid but, I can't find the bit I had mixed and I'm unsure of its composition. > > I believe it went something like this; equal parts of distilled water, > kerosene and methyl hydrate. Anyone remember whether this is IT ? > > I try NOT to clean lenses at all, if possible. However, my filters bear the > brunt of the abuse that they get protecting the front elements and they need > to be cleaned. > > Cheers > Dave ------ Unsubscribe or change to/from Digest Mode at: http://www.lrflex.furnfeather.net/ Archives are at: //www.freelists.org/archives/leicareflex/