Have you...

I have all in one desktop so i don't need to clean it.

I clean it every few months

I lick my processor every day

I clean it quite often with a blower.

Laptop ftw!! d-;

I clean it atleast once in 3-4 months. I just open it up and use canned air to blow dust out. Then, if needed, you can use those small ear cleaning things (forgot how they are called) and some special cleaning stuff (that has alcohol in it) to clean all the coolers. If you haven't cleaned it for a year or so take off CPU cooler and change thermal paste (thermal grease).

Dude I cleaned mine a while back, dust had gotten in everything, 'specially fans and heatsinks. Took me like 20 minutes to do.

Idle temp of my vid card before cleaning? 42 degrees or so. After? Around 31 xD

The left side of my tower has a window and most of the time when I peek in it's fine, I have enough fans in there going at high enough speeds to keep the dust off. I do clean it prior to attending LAN-Parties though. This usually happens once every 1-3 months.

I've always wanted to, but never knew how. Its been quite awhile since its been cleaned.

Better question would be is when was the last time you cleaned your keyboard?

I did the other day after 6 years of use. Wow was it dirty under those keys.

Been putting it off until yesterday. Except... I guess I missed that deadline. So I'll probably clean it out (and add my new Christmas gift hard drive!) tomorrow. Or today, since you reminded me. It's been about two years and I expect to find a lot of dust, but the last time I cleaned it out, the built-in filters had actually done a very good job of keeping the dust away from the vitals.

I've had PC's run 4+ years and I never cleaned them out. 4 years is about as long as most will last as far as video-gaming goes so I never bothered. I just bought a new one, sure it still worked but it didn't play the newer games well.

I throw mine in the dishwasher every other week.

Mine PC is always "opened",because there are always things that I need to do ( for example changing parts, upgrading, cleaning, plus some of parts "like" to "jump" of their place and I need to put that again in and etc) and because my video card doesn't have additional ventilation (though I installed one additional, but it didn't helped a lot) it gets hot after playing and keeping my box opened helps :P. So I check my PC and dust quite often :) And yes, I'm female computer nerd :DD

I once opened a case to an old PC and found a dead rodent. Fun.

Oh it was last year :P

I just use the power washer when I'm doing the car, leave off the snow foam adapter of course. Hair dryer on the motherboard and girlfriends straiteners for the cables.

I clean mine every month

I rarely clean may PC, the last time was some days ago when I build my new PSU into it. I found much dust, a dead bee and peanut shells in it...

Heh, you should check out your keyboard sometime, if you have any pets that shed hair, expect to find what looks like a rats nest under the keys