I have used Caig's compressed air in canisters. But you need to make sure to not spray from the nozzle too close to the components and make sure it is a gentle flow of air to dislodge the dust and dirt. Mostly I try to keep a cloth over the equipment when we are not using it.
Dust Removal
We live on a dirt road and thanks to certain neighbors who refuse to slow down, we are constantly wiping dust off horizontal surfaces in our house. I'm sure there must be dust inside my components but am not sure of the best way to deal with it.
Blow it out w/ compressed air?
Use a vacuum?