For a better finished when mopping, it is possible to use cleaning products in your water tank. They can be both soapy waxes for parquet and floor cleaners that are free from corrosive chemicals that can damage the dispensers in the water tank.
The recommended quantity will be the same as that indicated in the specifications of said product.
At the end of the cleaning, remove the mop and clean it under the tap, then leave it to dry for next use.
Rinse the water that may have remained inside the tank, to trying to remove the cleaning product used.