@owashii@plush.city those can dusters are useful
we have one at work that we keep around purely for rapidly cooling DUTs down to see if some behaviour we're seeing is thermal-related--the spray out of them is cold and gets colder as you spray it, and if you spray them upside down you can get out liquid whatever refrigerant they use (usually butane or one of several fluorinated hydrocarbons), which has a boiling point of between around -50°C and 0°C, depending on the refrigerant
-F