You know Clem55, I'm forever leaving something in the microwave. I learned if I put the sponge or dish rag in there and nuke it for a few minutes it sterilizes it. Imagine what they thought when the crispy sponge was discovered. It had been in there about a week. Soak it and it was fine for use, but they teased me about how much gravy it would take and one said we needed a ginsu knife to cut it with, go ahead and get the pancake syrup.
But at least we are in the Kitchen trying!