I live in Phoenix, AZ and I have to clean my computer constantly because of all the dust in the air especially during the winter when the windows are open all the time. I agree with whoever said that canned air is dissapointing. It's great for cleaning CPU heatsinks, HDD bays, graphics card fans, and the plastic grills on the front of my Cosmos case. For everything else I use a 4x6 LCD cleaning cloth. The smooth kind though not the micro fibre ones since they would get snagged on everything. It's a bit tedious but it does a fantastic job especially on the fans in my case. Plus it's a hell of a lot cheaper than canned air, cleans 10 times better than canned air, and it's washable of course.