I noticed my pitot tube was blocked a couple weeks ago, seemed like a very fine material (a mud dauber?).  I tried to remove it the best I could.  On Monday, upon take-off, my gear warning sounded and the by-pass button light was flashing.  My ASI was showing 60 knots and was not moving higher.  I kept a slow climb, afraid to raise the nose as may ASI airspeed was not increasing.  I pressed the by-pass switch and cycled the gear.  Eventually, my ASI showed an increase. My pitot system has t