Most of the top of my case is taken up by a grill which I assume is to allow extra airflow through the case, but I'm slightly worried that it may be allowing a lot of dust to fall down inside it. The top does get quite dusty and most cases don't have this feature so do you think this is a good idea? I'm thinking of either covering it completely or rigging up some kind of dust umbrella.
P.s.This is the case I have: http://www.amazon.co.uk/Corsair-Carbide-Series-Compact-Computer/dp/B009GXZ8MM/ref=sr_1_2?ie=UTF8&qid=1399135654&sr=8-2&keywords=corsair+case
P.s.This is the case I have: http://www.amazon.co.uk/Corsair-Carbide-Series-Compact-Computer/dp/B009GXZ8MM/ref=sr_1_2?ie=UTF8&qid=1399135654&sr=8-2&keywords=corsair+case