I'm looking for a compact, airline-safe way to clean my digital camera's sensor when traveling. I am considering a Visible Dust sensor brush, but it needs canned air to work properly; bringing a whole can of canned air along isn't light or compact, and might it upset airline security people??? Many cleaning fluids are flammable, too, which might also be a problem for carrying on airlines. Currently, I only have a bulb blower, which has done OK so far, but I'm afraid that someday I will be traveling somewhere and need more serious cleaning than a bulb blower can provide. What are the rest of you doing?