I started eggplant seeds indoors in a seed starter mix and transplanted them in a 2 inch bio-degradable containers about a week ago, using a soil-less potting mix with no fertilizers in it. The bag was outside and was wet due to rain, and the soil was quite moist when I transplanted the seedlings. Last night I noticed a white fuzz on the outsides of the containers and I wiped it off. I am now wondering if this is damping off disease. If it is, is there a way to eliminate it? I have washed the trays with bleach, taken the containers out of the trays and put them near a small fan. Besides using chemical fungicides, is there another remedy I can use to kill the "fungus?" I have a feeling the soil i used must have been compromised since it was sitting out in the rain for a period of time. What can i do to sterilize this soil again. First time seed starter here so any information will be helpful!

Thanks