Clean Clogged Pressurized Breville Portafilter Basket

Many espresso machines have pressurized portafilter baskets, like Breville, Delonghi, Starbucks or Saeco. They can get clogged and not allow coffee to flow through. This video shows a way to clean the baskets using oven cleaner or drain cleaner. These cleaners use sodium hydroxide, a powerful cleaner, which will dissolve coffee residue. Be careful when using these cleaners which can burn skin and irritate lungs - wear rubber gloves, use outside if possible and use eye protection.