I recently flew UAL- first time. When i found my seat in the "back" of the plane i saw a puddle of water on the seat. I asked the woman for a towel and looked up to the ceiling. There, stuffed into the seam by the reading light etc was a baby diaper to soak up the AC condensation! Gross! Oh she told me it was clean! As soon as the hatch closed i moved to another seat! Plane was filthy too after it sat waiting for us to board! Never again. I’ll return to US Air for all future trips to SC!