Just paid c. $10.00 for a DYNEX Compressed Gas Duster, IOW a 10 oz. can of compressed air from my local Best Buy. Not so much the money per se, but each time I buy one of those, I get this nagging feeling that I've had been had. Has anyone with real world experience in the area of computer cleaning tried such solutions as the MetroVac duster line and might be able to comment on the respective merits of air compressors vs. air cans..? CJ