the only time i've seen that was my 09 f150 and it was water from the third brake light seal leaking. Couldn't see it on the headliner it ran on top of the liner and down the front winsheild. couldn't even tell the headliner was wet until you pushed on it and it gushed water. I've also seen ppl that have spilt water in their car and not gotten it completly dry it will do that but only in the extreme heat not in 54 degree weather. Check your floorboads for water especially the rears.
2012 Focus SE hatchback sport, 203a, MTX-75, Candy Blue, Custom 2.5 Exhaust, K&N Typhoon.
Sonic Crew #012 E-123 Omega