[Insomniac]

Are there any aerosol dust removers out there which can be used safely on mirrors to get rid of fine dust - the sort that only seems obvious by torchlight?
I imagine there must be traces of propellant in with the air, but have no idea if all these are chemically damaging to a protected aluminium coating.

On the subject, what about their use on lenses?? Sorry if this topic has already been 'done', as I'm sure it must!
Thanks
Chris