Smeg DF344BW Manual page 36

User instructions
Adjusting the amount of rinse aid

The dishwasher must be switched on and the door closed.

Press and hold the cycle delay button until "b" appears on the
display followed by the current setting (e.g. b3).

Press the cycle delay button once or several times to select the
required hardness (from b0 to b5) according to the following table.
After carrying out the adjustment or displaying the current setting, if you
do not touch the button for a few seconds the dishwasher will
automatically exit from adjustment mode and return to the standard
operating mode.
b0
b1
b2
b3
b4
b5
Default settings: b4 - 5 ml

The amount of rinse aid must be increased if the washed dishes
appear dull or feature circular stains.

If, on the other hand, the dishes are sticky or have white streaks, it is
necessary to reduce the rinse aid setting.
RINSE AID ADJUSTMENT TABLE
0 – not dispensed
minimum 2 ml
3 ml
4 ml
5 ml
maximum 6 ml
36