Do you clean your APs?

Does the dust covering the modules make it work worse? Do you clean your APs and SMs? Our main cluster is on the grain elevator and the APs covers with a coating of dust for a couple of months.
We had noticed a considerable improvement of a link with one of our clients after changing the AP which was dirty to the clean one.

I imagine the dust can produce some kind of electro-static charge that somehow can influence in the Canopy (or other) antenna system. We all know an antenna it’s an radioelectric conductor, so I think the dust can affect the signal as well as you described it.

Would be better to clean it out if the dirt is thick enough.