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  Chris at eSpares says...

  We would advise when de scaling to use a specific descaling product as Vinegar may cleat the deposit but may 'taint' the coffee. Always refer to your appliances instruction book when possible for details on de scaling.

• if you are not sure what kind of descaler to use, I suggest you use half white vinegar and half water. Only 2/3 fill the water reservoir as it may bubble over when heated. Just run it through with no coffeee in it - only water and vinegar. Then rinse with cold water. Then run with clean cold water twice more without coffee before using for real. By Anne B - Kent - 07 March 2015