If you got coolant on the belt it will never stop squeaking. You will need to replace it.
Ah chit. Will it ever be anything to worry about? I also forgot to mention that when it gets running & warming up, it will go away.
That sounds like the tensioner. Mine did the same thing at about 120k miles. At 127k miles it stopped going away and just chirped all the time. A new belt was only a temp fix and the chirp came back within 1k miles.
A new tensioner and no chirp cold or warm.
I did the Sd tensioner up grade.