my hummingbird does the same thing,condensate,bogus readings over the canyon.However i have left the kayak outdoors with the shield on,exposed to rain,heat cool etc...and my hbird still works well .I just put the dielectric grease on once a month. it'll be 3 years old in august.
I wonder if ill still get the funky readings in LJ if i get the xducer for the trident, mounted outside?
have a good one all
METALBOB