Start manual maintenance in case of quality issues.
You can clean the maintenance station, wiper, clean wall, matrix plate and you can print a nozzle classification chart to optimize the nozzles.
The nozzle classification chart can only be printed on smooth, white, opaque media. Any other media will deteriorate the optimization.
Wait until the [Completed] button turns black and the printhead carriage is in maintenance position, before you open the top cover and start cleaning.