Smeg Portofino CPF9IPYW Manual page 46

Shiny surfaces can form due to the bases
of pans, especially aluminium ones, rubbing
on the surface, and due to the use of
unsuitable detergents. They are difficult to
remove using conventional cleaning
products. It may be necessary to repeat the
cleaning process several times. Use of
corrosive detergents or rubbing of pan
bases can wear away the decoration on
the hob over time and contribute to the
formation of stains.
Ordinary daily cleaning
Always and only use specific products that
do not contain abrasives or chlorine-based
acids.
Pour the product onto a damp cloth and
wipe the surface, rinse thoroughly and dry
with a soft cloth or a microfibre cloth.
114
Cleaning and maintenance
Weekly cleaning
Clean and maintain the hob once a week
using an ordinary glass ceramic cleaning
product. Always follow the manufacturer's
instructions. The silicon in these products
creates a protective, water-repellent
membrane which also resists dirt. All marks
stay on the membrane and can therefore be
removed easily. After cleaning, dry the
surface with a clean cloth. Make sure that
there is no detergent left on the cooking
surface as it might undergo an aggressive
reaction when heated up and could modify
the structure of the cooking surface.
Food stains or residues
Do not use steel sponges and sharp
scrapers as they will damage the surface.
Use normal, non-abrasive products and a
wooden or plastic tool, if necessary. Rinse
thoroughly and dry with a soft cloth or a
microfibre cloth.
Do not allow residues of sugary foods (such
as jam) to set inside the oven. If left to set for
too long, they might damage the enamel
lining of the oven.