I bought a four-pack of the NXT 10oz Air Duster. Specifically I purchased it at this time to blast dust out of the filters in my new Romba and Shark stick-vacuum but I also use it for cleaning my computer hi-fi and ham radio equipment. It works as it should. No complaints.
This froze up before I could even get a whole keyboard blew out. It took a good while to unfreeze and so cold it hurt to hold. I finally gave up trying to spray my laptop out bc few secs I could use wasn't worth the wait to let it unfreeze and not even complete the keyboard not even mentioning the other parts of the laptops like the fan crevices etc.