Best Espresso & Coffee Machine Cleaning Tablets

Picks are chosen on machine compatibility first, then cost per clean. Prices change often, so check the current listing.

Portafilter machines (backflush)

1. 1

   Confirm a 3-way solenoid valve. If not, soak the basket instead.

2. 2

   Add one tablet. To a blind basket and lock it in.

3. 3

   Run 5 cycles. Of 10 seconds on, 10 off.10 seconds

4. 4

   Rinse with plain water. In the blind basket until it runs clear.

5. 5

   Soak your regular basket. In hot water with half a tablet for 20 minutes.20 minutes

Bean-to-cup machines

1. 1

   Wait for the cleaning indicator. (often every 200-300 brews).

2. 2

   Use the maker's or a confirmed-compatible tablet.

3. 3

   Follow the on-screen prompts.

4. 4

   Do not interrupt the 10-20 minute cycle. , which can trigger error codes.10-20 minute

Drip makers

Drip makers mainly need descaling. For coffee-oil buildup, use a cleaner the maker labels for drip machines (Cafiza is made for espresso equipment), following its dose and rinse directions, then run two plain-water cycles.

Backflush with plain water between tablet cleans. Bitter or flat coffee from the same beans and grind, or a darkening shower screen, means clean now and shorten the interval. See the maintenance schedule.

For limescale, and the descaling interval for your water hardness, see how to descale a coffee machine. Barista Express owners can use our Barista Express descaling steps.

Check your manual before backflushing. Forcing a backflush on a machine without a three-way valve can push coffee and water back into parts that are not designed for it. If you are unsure which type you have, our espresso machine maintenance guide explains how to tell, and how to clean an espresso machine covers the routine for both types. Still choosing a machine? Our top beginner espresso machines guide compares semi-automatic, super-automatic and capsule options, so you know which cleaning routine you are signing up for.

Coffee contains oils that coat the brew group, spouts and internal tubing. Over time they turn rancid and add a bitter, stale note. Tablets contain detergents that dissolve these oils, which a plain water rinse does not remove.

Coffee oils build up on the shower screen, inside the group head and in the brew group of super-automatics. Within weeks they go stale and add a bitter, rancid edge to every shot, which many people mistake for bad beans. Over months, the residue can partly block the shower screen and valves, so water flows unevenly and shots channel. In super-automatics, a neglected brew group can stick or clog, and some makers note that damage from skipped cleaning is not covered by the warranty.

Generic tablets from reputable brands work well in many machines, but for super-automatics follow the manufacturer's guidance on compatible tablets, especially while the machine is under warranty. If your coffee already tastes bitter even with fresh beans, see how to fix bitter espresso before changing anything else.

• Dishwasher tablets: they can damage seals and are hard to rinse.
• Skipping rinse cycles: leftover residue tastes soapy.
• Backflush tablets in bean-to-cups: they may over-foam or trigger errors.
• Tablets in Nespresso or Keurig: pods scale, not oil.