It looks like this will be a bit of a project. I will get to it in the next couple of weeks. I really thought I had removable grills that would make cleaning a snap.
This design really makes it a chore because of that mesh! My other cases were fairly simple to clean. On the other hand that mesh keeps the inside of the case fairly clean but instead now the grills hold all the dust and are not easy to get to. I've got a copy of the manual and will probably go ahead and take off the top and front grill to do the job correctly. The top grill is a bit of a pain because it has a SATA dock on it with lots of attendant wires. I'll be sure to do it when I have an hour to devote to the job.
I've picked up canned air and will try that. With the mesh removed that will definitely work fine. I am just curious, I don't have a shop vac anymore but am wondering if an electric leaf blower would be similar in air output or much stronger. I never use my leaf blower because it is electric but am wondering if it might be useful or too powerful? I don't think I will resort to that but would like your thoughts.
BTW, my case really isn't dusty inside, it is just the grills which are hard to get from inside the case that are not clean and thus restricting air flow. I suppose I could blow the dust into the case from the outside and then blow out the dust from there but I don't think I want to do that. At any rate I now know it won't be a five minute job and will do it when I can concentrate on doing it correctly.
Thanks Phillip for the detailed plan and thanks RC for the warning. I had a general idea one didn't want to spin up their fans very fast manually but couldn't remember any specifics. I will be careful.