Response from Katalin:
The house was cleaned before Megan's arrival. She was renting a beach house, and I can only imagine that she found sand on the porch. I warn my renters in my instructions that since we live there often, our own supplies are left in the door of the refrigerator, and our previous guests did remove their stuff before leaving. So I find it highly unlikely that there could have a half refrigerator's full of food left behind. Since I was out of the country, I did not have a chance to check into the condition of the dishes left in the cabinets by the previous renters. In future this will not happen again.