I use compressed air. There is an electronics cleaner that is similar to brake cleaning fluid but it will not hurt anything electronic. Techs use it to clean switches and such. If the have air handlers for heating and air conditioning you need to have hi performance filters installed. They will improve thind dramatically. I would say in my house by about 90%. I would not worry about the stereo. I would worry about breathing that stuff in all the time. Read up on Silicosis!
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?