Last night (Friday) I made a starter, about 1.5L, standard 1.04-ish gravity, and pitched a smack pack of Wyeast 1056 American Ale. I'm doing it in a 1/2 gallon growler, and did not leave sufficient headroom.
When I came downstairs this morning, the starter had pushed the foam stopper out, and it was krausening happily down the side of the growler.
I used my star-san spray bottle and nuked the top of it to kill anything growing on or inside the neck, then cleaned up. I re-sanitized the stopper and put it back in, then put the starter back on the stir plate.
My question is... how likely is it that this starter is contaminated to the point that I shouldn't use it?
I'm considering using it anyway, to sort of experiment with "It's actually really hard to ruin your beer" but I'm not sure if a starter is the best thing to gamble with. I do have the option of getting another yeast pack today from the LHBS.
Also... if you think I could use it, feel free to come up with an appropriate name for the IPA (Chinook IPA kit from NB) that I'd make with it tomorrow. Maybe something volcanic, lol.