Carole Cladosporium is also found in the home .........
http://www.domestos.co.uk/germs/cladosporium.asp
I am off on half term this week and have totally blitzed everything and bleached all the UPVC window frames that could be harbouring Cladosporium.
I keep their kibble in an airtight container too, will also wash their faces after they've eaten (I do this sometimes anyway) How do you steam clean it?