Our high-tech gas dusters use non-toxic, non-flammable and residue free carbon dioxide and nitrogen gases. These gases are ideal for cleaning all types of delicate electronic and optic devices. You only need purchase the precision valve once and simply replace the steel gas cartridges when empty (which by the way are 100% recyclable).
Don't be fooled by aerosols that claim to be "canned air" (there is no such thing - read the label). Those aerosols actually use chemical propellants that are not very effective and can leave a residue.