Compressed Air
The compressed air cans are great to get dust and dirt out of electronics
BUT
many people use these cans incorrectly and can damage electronics!!!
You should only spray in short bursts and pause in between spraying. You should feel the can to see if it is cold. If it gets too cold, moisture can form and if that happens and you are blowing electronics. the moisture can be sprayed onto the electronics. Electronics do not like moisture.
Remember only short bursts and pause in between bursts to prevent the moisture.