Cleaning Filters and Lenses

[dpanicc1]

I read a few threads about cleaning lenses and filters with special fluids--safe for coated lenses, lenspens and blower brushes. Here's a couple of questions:

Assuming one holds the can upright, why not remove particles from lenses with canned air? Should be fine, right?

I have a promaster 77mm UV filter; no matter what I do I can't clean that sucker. Do some manufactueres' products clean more readily than others?

[kraterz]

Different filters respond differently to lens cleaning fluids. My regular Hoya multicoated filters are OK with Kodak lens cleaner. The Hoya HMC and SHMC filters and the B+W's are very problematic. I had to resort to cleaning them with water and drying them with microfibre cloth, otherwise there was absolutely no way of getting the colored streaks off them. These days I resort to water and soap! Works darn well.

[westgorge]

Just a plain eye-glass cleaner. Costco sells the fluid and will refill the bottles for free!