Marc and Morgan from Whole Latte Love show you how to backflush a Gaggia Classic espresso machine.
Urnex Cafiza Espresso Machine Cleaner: http://www.wholelattelove.com/products/urnex-cafiza-espresso-machine-cleaner
Backflush Disc: http://www.wholelattelove.com/products/profitec-backflush-disc