I have a Thermalright AX-7 with a48.5cfm fan that I fear may be getting dusty becuase I have a 108cfm intake case fan and no filter. I ordered a filter but it has been on backorder for over 2 months, I will call them tommorow if I remember. I have noticed a slight increase in CPU temps over what they were when I first installed the AX-7. Anyway, what is the best way to get the dust off of the hs/f? Thanks guys.