The quality of the water jet can be improved by cleaning or replacing
the so-called aerator.
Never spray cleaning agents directly onto mixers or showers.
You descale the aerator by soaking it for around ten minutes in a household
cleaning agent suitable for this purpose
Limescale deposits in the shower head block the jets and allow water
to spray around in all directions.
The shower head is soaked in cleaning agent suitable for this purpose
and then thoroughly rinsed off.
Depending on the model, fixed overhead showers can be completely
unscrewed and treated with a descaling agent in the same way..