Zanussi HC9518 Instructions For The Use & Care page 11

What do I do with 'spills'?
Allow the hob to cool before cleaning.
Remove spills with a clean, damp cloth
(no detergent). If there is detergent in the
cloth, you may leave a layer of soil-laden
detergent on the hob surface which can
result in discolouration next time the area
is switched 'on'. This is why dishcloths
and washing-up sponges should not be
used. If it happens the special Cleaner-
Conditioner provided will remove it.
In particular,
sugar solutions
e.g. jams
and syrups, must be wiped off the hob
surface before they set and become hard
to avoid the surface being damaged (see
'Important Notes' page 22.).
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