Descaling

[hotrod351]

so yesterday my breville BDC550XL descale lights starts blinking, ok i descale it, had too do it twice for some reason before the descale light would go out, but what i cant figure is why it came on, i have a good size pryolox iron filter then a water softener and then reverse osmosis, so i cant see how the machine would get any scale in it.

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