Espresso coffee : do you really know how to clean a coffee machine?

Maybe you think you know how   do it – very easy indeed – and maybe… you can even  drink it – very good and easy too – but …. do you know how to wash  properly a coffee machine? Let’s have a look here….to have the best coffee  your machine has to be perfectly … More Espresso coffee : do you really know how to clean a coffee machine?