On Titan, methane can exist as a liquid gas or solid, just like water does on the Earth. In fact, a methane cycle would be very similar to a water cycle on the Earth.

What we have is methane clouds being formed over the pole in the summer season for that hemisphere. There must be a methane ice cap, or maybe a methane lake under those clouds. The Sun’s energy is evaporating the methane and it is forming the clouds. The clouds are moving, but they dissipate once they get away from the area. They must be reaching drier air. It is also possible methane is raining or snowing down.

We need a amphibious MER on Titan.