invisible water on solar panels

I was trying to cool down solar panel, with a small flow of water.

But ss you can see in th screen below, instead there is water on the solar panel, it is not shown.  

There should be a small flow of water that came from the vent on the left, that covers the 5 first tiles of this panel, according to the rollover infos.

Note that there's still steam on the panels just above, but all these panels have water below 100°C