|I read that as "Buying a Used Can of Compressed Air" and LOL'd. |
Canned air works fine (and is much better than a paint brush), but if you have many computers to clean, get an air compressor.
Please do not use a feather duster. The static electricity will kill your computer.
Socket 939 | Dual-core Opteron 185 @ 3.2GHz | 4GB | 1.0TB | Win7 x64
GeForce GTX 460 1GB | X-Fi Ti Pro | A8N32-SLI Deluxe | Antec P182