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Alcohol will also work quite well and evaporates off and doesn't leave a film.
If you are going to use compressed air you can get compressed nitrogen gas thats inert and works quite well at removing particulate matter. Normal compressed gas can be very harmful to some lenses such as a fluorite lens and leads to cracking.
If you want a really good clean and these are really high quality optics I would suggest Collodion USP. It makes a sticky film that you rest cheese paper in and it will take off 99.9% of all matter but leave the protective films on the lens completely intact and doesn't result in any wear or tear like other methods do. I use this on my expensive telescope lenses and it does wonders.
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