AEG FAVORIT 403 Operating Instructions Manual page 17

At the end of any washing programme the lid is always open, ready for the
next wash.
Since not all detergents are the same, you should also consult the
instructions on the packet.
Remember that insufficient quantities of detergent will produce poor
washing results whereas an excessive amount of detergent does not improve
washing results and is also wasteful.
Using no more than correct amount of detergent also contributes to
reducing pollution.
Phosphate free detergents with enzymes
In these low-alkaline compact powders the environment unfriendly
components have been replaced by natural enzymes and other more
biodegradables substances.
These new compact powders are generally phosphate-free.
As phosphates have water softening properties, we suggest you to add salt to
the container even if the hardness of your water is as low as 4°dH (7°TH).
This will avoid lime deposits on crockery and the inner tub.
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