You always gotta give it a check and clean up once in a whyle...

I actually gave up on leaving the case closed because i had to keep prying it open every other week because of dust accumulation and sometimes overheat.

Just remember to clean the connectors and other bits and pieces throughly, don't let the dust accumulate and you shouldn't have problems. Fail to do that though and you might end up with damaged hardware, trust me, i've lost a couple of sticks of ram because of dust and static.

All work and no play makes me..., well, you know the rest.