I use cans of compressed air to remove dust from the interior of a pc case. It works for me.
I seem to recall that vacuum cleaners should not be used. Unfortunately I am growing old disgracefully and can't remember why.
Here's a handy tip - When using compressed air use a small piece of tape to prevent fan blades from rotating.
THe Why would be that vacuaming tends to build up alot of static charges which is never a good thing around the inside of a computer system !! One more TIP : If it has been awhile Take the entire case outside before spraying the compressed air !! (you'll be glad you did)