About Family Window Cleaning & Property Maintenance, LLC: Owner and operator, John Cristoforo, founded Nationwide Window Cleaning & Property Maintenance in 2009 after many years of mentoring at National Window Cleaning. In 2015, John changed the name of the business to Family Window Cleaning & Property Maintenance, as prior to the name change the local community assumed the business was tied to the similarly-named corporate insurance company and serviced the entire country.