Preventative maintenance, esp. to prevent overheating?
We have two iMacs, an older 20" and an early 2008 24" (A1225, 2.8 GHz). The older one's HD recently bit the dust (fixed by Apple last month). We'd been noticing the fan running a lot, and a lot of heat before it died. I suspect the fan was choking on dust buildup and caused its premature death. So I'm wondering if there's a procedure for doing some preventative maintenance for my 24", probably involving opening it up and blowing dust out of key areas? Or any other easy-to-moderate skill-level suggestions from you experts out there??? Thanks in advance!