Dropping out of boost/not activating

[47_MasoN_47]

Lately for some reason superyaris has been falling out of boost or just not activating right. On my way home there were 2 times where boost didn't activate until way past when it normally does. I've checked the wiring and don't see anything obviously loose.

Also I noticed this. I don't see any more around it and it's possible I could have spilt some when I changed the oil about 1700 miles ago.



But then there's this, that I just don't have any idea at all about. This is on the inlet from the throttle body to the top of the blitz.



This is what it looks like underneath that moist looking area.



What's going on here?