Descaling strips limescale out of the water circuit. On five of the six machines below the machine tells you when, and the makers publish no fixed interval at all. Only Gaggia puts a number on it.
When each machine asks, and what it asks for
| Machine | What triggers it | Interval published | Descaler named | Cycle |
|---|---|---|---|---|
| Gaggia Classic E24 | Nothing on the machine; a calendar | Every 2 months | GAGGIA descaling product | Four tank-fulls, with a 20 minute soak |
| De’Longhi Dedica Style | Orange descale light | None | De’Longhi descaler | About 25 minutes |
| De’Longhi Magnifica Evo | Descale indicator, tuned to water hardness | None | De’Longhi descaler | About 30 minutes |
| De’Longhi Rivelia | Message on the home page, tuned to water hardness | None | De’Longhi descaler | About 30 minutes |
| Philips Series 3300 LatteGo | Calc / Clean light | None as a date; Philips claims up to 5,000 cups with AquaClean | Philips descaler | About 30 minutes |
| Ninja Luxe Café | DESCALE light, tuned to water hardness | None | Ninja descale powder, or white vinegar | About 90 minutes |
Set the water hardness before anything else
On four of these machines the descale prompt is not a timer, it is a calculation, and hard water makes it fire sooner. De’Longhi’s Magnifica Evo manual puts it directly: setting the water hardness as soon as possible lets the machine optimise how often it asks to be descaled. The Rivelia manual says the prompt comes after a predetermined period that depends on the hardness, and that entering the real local figure can make descaling less frequent.
The Rivelia comes with a total hardness test strip in its accessories pack. De’Longhi treats the strip as a per-model extra on the Magnifica Evo, so check the box before assuming you have one. The Ninja Luxe Café includes one and asks you to dip it, count the purple squares from 0 to 5 after a minute, and dial the matching hd number into the machine. Philips leaves its machines on hardness 4, hard water, until you change it, which is the safe default and the most expensive one if your water is soft.
Manual espresso machines
Gaggia is the outlier and the simplest. The Classic E24 manual says descaling should be performed every two months, full stop, with the GAGGIA descaling product only, and it rules out vinegar and every other descaling agent by name. The cycle is manual: half the solution into a full tank, two cups from the steam wand and two from the group, machine off for about 20 minutes while the solution works, then repeat and rinse until you have run four tanks through.
The Dedica Style waits for its orange light, then runs about 25 minutes and needs a 1 litre container under the spouts. One step is easy to miss: during the cycle, close the steam dial now and then so some of the descaler goes out through the coffee spouts rather than all of it through the steam wand. Otherwise the coffee circuit does not get treated. De’Longhi warns that unsuitable descaler, or a descale done wrongly, can leave you with faults the guarantee does not cover.
Espresso machines with a built-in grinder
The Ninja Luxe Café takes about 90 minutes, far longer than anything else here. Ninja’s warning for ignoring the light is unusually direct: drink quality will drop and the machine may clog and stop working. You dissolve the supplied Ninja descale powder in 1.1 litres of water in a separate container and pour that into the reservoir. Ninja is also the only maker in this set that offers an alternative: 474 ml of white vinegar, topped up to the Descale line with water. Afterwards the portafilter, main drip tray and milk jug are hand washed so no solution taints the next drink.
Bean to cup machines
All three follow the same shape, with the filter as the trap. The Magnifica Evo needs the water softener filter taken out before the descaler goes in, and reinstated at the rinse. Pour in a 100 ml pack of De’Longhi descaler to level A, add a litre of water to level B, and put a 2 litre container under the spouts. The Rivelia walks you through the same thing on screen and wants a 1.5 litre container.
Philips’ manual for the 2300 and 3300 series is the strictest on chemistry. Empty the whole bottle of Philips descaler into the tank, fill to the Calc / Clean mark, and put a 1.5 litre container underneath. Thirty minutes covers a descaling phase and a three minute rinse. Under no circumstances use a descaler based on sulfuric, hydrochloric, sulfamic or acetic acid, which rules out vinegar, and Philips adds that failing to descale voids the warranty. Fit and activate a new AquaClean filter when the cycle ends.
A water filter changes the sums
Philips is explicit that AquaClean reduces limescale build-up and so diminishes the need for descaling, and that is where the up to 5,000 cups claim comes from. The catch is in the same manual: the machine has to be completely limescale-free before you start using the filter, the filter stops working after 95 litres, and it should be replaced at least every three months whether or not the machine has asked. Brita filters are not compatible.
De’Longhi’s DLSC002 softener lasts about two months in normal use, or no more than three weeks if the machine sits unused with the filter fitted. Ninja’s filter is set with a date dial two months ahead. The Gaggia Classic E24 has no water filter and no hardness setting in its manual at all, which is why its interval is a flat two months.
Sage machines
Sage descaling, including the one model with a published interval, is covered in our Sage descaling guide, and its cleaning cycle in the Sage cleaning guide.
What none of them publishes
No maker here publishes litres per descale, a cost per cycle, or how many cycles a machine is good for. If yours is asking sooner than you expect, the water hardness setting is the first thing to check, and your own manual is the one to follow.
