Cafiza is the industry standard when it comes to removing oily coffee residue. Soak your parts in it to remove built-up grime, or use it for a daily backflush. (Backflushing is when you force water ...

But despite my mechanical inexperience, I managed to find, clean and restore a 15-year-old Gaggia Classic espresso machine with just a few tools and a little patience. Now, I realize this guide ...