If you de-rig daily or if you remove your probe when you hanger your
glider it should seem obvious to protect the remaining socket from
bugs/debris. On our Duo we have a short piece of tygon tubing which we
use. We connect one end of the tube to the prandtl socket and the other
end gets connected to the fin pitot. We drilled a very tiny hole in the
middle of the piece of tygon so that we don't hold any pressure between
the connections.