Front vent valve leaking again

2006 Tundra 4WD limited: About two years ago I realized that these two vent hoses were caked. So I took them off and cleaned them up and blew em out with a compressor. Now after all this time I totally forgot about the issue and I see it's a lot worse then before it's caked again and leaking all over stuff further down past what you can see in the picture. I'm not sure exactly what the hoses are venting and what is leaking. Now is it best to clean them like before or is there an upgrade to prevent this from being a constant issue. Also I'm assuming I'm going to have to top off whatever is leaking.

 

As to "what is this", https://www.tundras.com/threads/help-identifying-part.119363/