Russell Hobbs RHOK3123 Classic Satin Owner's Manual page 7

TO BOIL A SECOND POT OF WATER
Turn the Kettle OFF for 15 minutes and allow it to cool.
WARNING: Failure to allow Kettle to cool may cause water to
overheat and spray hot steam. The hot steam can
cause severe burns.
User Maintenance Instru c t i o n s
SCALE
Scale is mainly calcium carbonate (chalk), a harmless, naturally
occurring mineral found in most water supplies. 'Hard' water
contains more of this mineral than 'soft' water. When water is
heated, the minerals in the water solidify. This can make the water
appear cloudy; it may form a thin film on the surface of the water
after boiling; it may look like whitish pieces of plastic in the water; it
may form a film on the walls or element of the Kettle. On traditional
Kettle elements, scale forms a hard white 'crust' which adversely
affects performance and reduces the life of the element.
• The OPTEC™ DISC heating element fitted to your Kettle has
been designed and developed to resist this build-up of
permanent scale deposits on its surface.
• As soon as you notice a "film" forming on the water, or, when
cleaning the Water Filter, if you notice a "film" on the walls or the
element, simply rinse the Kettle and wipe it out.
• To reduce the build-up of scale residues, always empty any
residual water after boiling.
Any marking or residue on the element will not affect its
performance or efficiency. If you do decide that you want to
descale the Kettle, to remove any such residue, or to restore the
appearance of the Kettle, you may do so, but please use a
proprietary brand of descaler, suitable for use in plastic-bodied
products (even metal Kettles have plastic parts).
When using descaler, follow the manufacturer's instructions. After
descaling, empty the Kettle and rinse it out several times with fresh
water, then fill it with fresh water, boil and discard the water. This
should ensure that no chemical residues are left in the Kettle.
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