how do i descale my breville barista express? the light is solid on.

A solid Clean/Descale light means mineral buildup requires descaling. You'll need one Breville Descaling powder sachet.

1. Dissolve one sachet into 34 fl oz (1L) of water, then fill the water tank.
2. Press and hold the 2 CUP button, then press and hold the POWER button simultaneously. Release when the machine enters Descale mode (POWER button flashes, then all relevant lights go solid).
3. Press the 1 CUP button to start descaling the coffee component (~25 seconds). The button flashes, then stays solid.
4. Descale the steam component by turning the steam dial RIGHT towards the steam icon (~13 seconds).
5. Descale the hot water component by turning the steam dial LEFT towards the hot water icon (~8 seconds).
6. Repeat steps 3-5 to use about half the solution. About 17 fl oz (0.5L) should remain.
7. Repeat steps 3-5 again to empty the tank.
8. Rinse: Remove the tank, rinse it, refill with fresh cold water to max (68 fl oz / 2L), and repeat steps 3-5 twice more to rinse the system.
9. Press POWER to quit descaling mode.

HEADS UP: Never remove the water tank during descaling. The machine turns off after 5 minutes of inactivity in this mode; if that happens, restart from step 2.