The CO2 cartridges I get from cyberguys.com seems to be residue-less. Shook it up real good and sprayed it directly on a mirror, nothing there. If you like the rocket blaster but find it isn't strong enough, there is a foot-actuated air blaster available from
micro-tools.com.

As far as the static goes, I have an anti-static 'gun' left over from my vinyl LP days that still works.