I just ordered one of these from Amazon. Should arrive today. It got very good reviews there. It should come today and I'll let you know how it works. http://www.amazon.com/gp/product/B00006JN3G
I went with the following little kit, and I mainly use just the brush. And only if necessary I use the liquid with the supplied cloth. Just use light pressure, or I should say no pressure! In most cases just blowing off the dust is enough...
Usually a blast from my Rocket Blower does the trick, but if I need more, I use Formula MC, available from The Filter Connection ( http://www.2filters.com./ ).
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'A man will occasionally stumble over the truth, but most of the time he will pick himself up and continue on.'
Winston Churchill
Any cotton cloth will do and if you need cleaning solution a drop of water works. There are all sorts cleaning cloths, papers and fluids that you can spend your money on if you like. I don’t like to clean my lenses and prefer to use a UV filter that can take the abuse and abrasion of the cleaning.