Miele G 7804 Operating And Installation Instructions page 26

Effects of Processing Chemicals
Reactions between processing chemicals and soils
Effects
Natural oils and greases can be
saponified with alkaline processing
chemicals. This may cause a lot of
foaming.
In combination with alkaline processing
chemicals, loads with soiling that
contains proteins, e.g. blood, can
cause excessive foaming.
In combination with very acidic or
alkaline processing chemicals, base
metals such as aluminum, magnesium
and zinc can release hydrogen
(detonating gas).
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Action
– Use the "Regular" or "Extended"
program.
– Depending on the application add an
antifoaming agent that does not
contain silicone oils.
– Select the "Extended" program
(pre-wash with cold water) where a
cold water connection is available.
– Observe the instructions of the
manufacturer of the processing
chemicals.