help -- i have a beautiful large le creuset dutch oven that i managed to leave on a flame with a soup inside overnight. stupid, stupid on my part. end result was waking up to carbonated smell at 5 am and discovering the charred remains of chicken soup in a pile of black at the bottom of the pot. we vigorously scrubbed away most of the blackness and now the bottom is a dingy grey. is it safe to use still?