Espresso machines need more cleaning than most home brewers do. The combination of pressurized water, hot oils, and milk creates buildup that affects taste, performance, and machine longevity.
After every session (2 minutes)
Knock out the spent puck. Rinse the portafilter and basket with hot water. Run a blank shot through the group head to flush any loose grounds. Wipe down the steam wand immediately after each milk steaming, then purge it. Wipe the drip tray.
Daily (5 minutes)
Empty the drip tray. Rinse it. Empty the knock box. Wipe the machine’s exterior with a damp cloth. Refresh the water in the reservoir if your machine has one.
Weekly (15 minutes)
Backflush the group head with espresso machine cleaner. This requires a blank rubber backflush disc that fits in your portafilter (most machines come with one or you can buy for $5). Add a small amount of detergent like Cafiza to the disc, lock the portafilter in, and run several shot cycles. The cleaner gets pushed back through the brew path, removing oil buildup.
Soak the portafilter and basket overnight in a cleaner solution once a month if you brew daily. Coffee oils accumulate in microscopic places and make every shot taste slightly off.
Monthly (30 minutes)
Descale if your machine requires it. Hard water deposits build up inside the boiler over time and reduce performance. Most machines have specific descaling instructions; follow yours. Some prosumer machines (like Gaggia Classic Pro) need descaling every 1-3 months depending on water hardness.
If you use unfiltered water, descaling is far more important. A simple water filter pitcher between your tap and your machine cuts descaling frequency dramatically.
Replace gaskets and screens periodically
The group head gasket and shower screen wear out. Most home machines need both replaced every 6-12 months of regular use. Both parts are cheap (under $20 combined) and the difference in shot quality after replacement is noticeable.