Yesterday during preflight I found the airspeed indicator showing 50 knots while sitting on the ground. After some investigative work, I found quite a bit of water in the static line (lots of rainy weather here in SoCal). I depressed the static drain “button” and drained a lot of water out, which also reset the airspeed indicator back to zero.  Howver, I’m still seeing a lot of water “bubbles” in the static line between the drain port and the actual static ports. I had to disconnect the sta