Lian Li 011 Dynamic Razer Edition Side Fan Placement

Hi I have a question on proper side fan placement in this case, I have three ThermalTake Riing 12 fans. Now I have had them placed inside with the TT logo facing inside and I have had good results on temps, but my issue is that when I open the case for my cleaning I see a layer of dust on the mesh screens on the inside of the case. So I switched the fans around to try and fix the dust issue, but I am wondering is that the right thing to do or will changing the fan direction not do anything for dust. There is also the whole look of case with the fans turned with the "backs" showing compared with how they where on my first install. Thank you for any info, really appreciated "Note" I have a dog, so dust,dander and hair is a consent thing. just wanting to keep my pc running well