I like to keep the inside of my desktop as well as laptop free of dust and loose connections! I discover that either half inch paintbrush (non plastic bristle) or one inch paintbrush is really great for "brooming" dust off mommyboards , cooling fan/sink, etc while using your vaccuum tool (plastic, never metal end) in another hand at same time. For detailed dusting, you will need a very thin philip screwdriver to remove cooling fan covers usally found on graphic cards to better penetrate copper heat sink passageways. I choose disposable paintbrushes with yellow bristles commonly found at Home Depots and Lowes. As for connections, I find that those molex type connections (cheap variety) tend to crack inside and wiring ends coming off and short circuting at every whim around that is metal. And those crappy SATA connections that is far worse than molex connections.. SATA connections lack any secure clicking feeling that they are connected tight. a slight bump would loosen it. I had to tape SATA cable with any of the power supply cable that is close enough as an anchor to ensure that the connection stay there!! I wonder who engineered those lame SATA connection ends?? I also find that some power supply cables are corraled with overtightened plastic clamps that the plastic clamps start cutting into the wires and causing stray short circuits. I snapped all the friggin' plastic clamps and taped the harness with old trusty black electric tape. Any open molex connections are taped over with elecrical black tapes as well. those open molex connections tend to kiss all over the metal parts inside my desktop.. you never know if there is any stray electrical short ciruits happening anytime. Paranoia is good! BTW, sorry for not replying soon enough ...I just found my tracked discussions after waiting months for any message about my tracked discsusions by email that never came.. Oh , I have to come here to check it out ..