I've had interviews with people almost as bad as that - are those cots vinyl? are all your toys plastic? what cleaning solutions do you use? My home is very clean and I keep the toys and children very clean and I do admit to handing my daycare children wet wipes before eating when we are out and haven't washed our hands to remove the germs from the toys at the park or library, but kids are going to pick up germs, that's life! I would agree that maybe you want to pass on this family. But let them know all your policies and ask them frank questions and be sure before you decide. What have you got to lose by laying it on the line.