This works great, very very little amount inside when I air it out
www.ebay.com/itm/300mm-Width-Computer-PC-Dustproof-Cooler-Fan-Custom-Case-Cover-Dust-Filter-Mesh/291783159990?epid=1172850503&hash=item43efa1b0b6:g:sW8AAOSwDRlZk92
www.ebay.com/itm/300mm-Width-Computer-PC-Dustproof-Cooler-Fan-Custom-Case-Cover-Dust-Filter-Mesh/291783159990?epid=1172850503&hash=item43efa1b0b6:g:sW8AAOSwDRlZk92