You all have seen those red sleeves that snug over the pitot tube. I never thought a bug or piece of grit would want to call that tube home. Au contraire!
After 20 years a mud dauber wasp filed homestead papers on 89P’s pitot tube. The Comanche had been sitting outside for 6 weeks. The way the morning light was in my eyes during pre-flight, I never saw the muddy cap over the orifice. After pushing the throttle forward for take off, noting a lack of airspeed indication, I still rotated. The plane flies great. Just another good reason to know your power settings. Next time, when the plane sits out on the ramp the sleeve goes on.