How to Take off the Bottom Fan?

[TechnicGeek]

Hi,

 

I am using CoolerMaster MB511RGB chassis. I just wanted to clean front panel of PC case with vacuum cleaner after almost 2 years of purchase. Removed front panel and saw 3 fans, with one on the bottom not using philips screws like the other two:

 

 

Dough! I don't think I can remove that fan without breaking rivets and I don't think I know where to get same 4 screws that mid and top fans have:

 

 

Should I just leave fans in place and use damp cloth and q-tips for the job?

[jaslion]

All you really need to clean those fans is a paint brush.

 

Those screws used are just standard fan screws nothing special. Not sure why they decided to use push pins for the bottom fan. Usually just pushing the pin gets it out no problem.

[TechnicGeek]

@jaslion I have a paintbrush. I need to remove front mesh and probably side meshes too. I think they can be removed. The bottom clips can be pushed out of their places but another 4 hooks on each side don't move easily:

 

 

I used to clean front mesh with baby wipes until it started oxidizing. Manufacturer could have mentioned proper cleaning in chassis manual but didn't so I had to learn my lesson. I am looking for information on how to restore mesh, wondering if black glossy/matte paint spray will do the job: