Snail mail.

Our broadband speeds have been slowing down and on wet days going away completely. In our case it was leaves on the line of sight! There are trees between us and the transmitter ( we get broadband via a local wifi system) and when it rains the wetness blocks the signal. So today the guys have moved the receiver to a clear line of sight with no trees and I have re-routed the cable and we are back in business.