I had given up hope. Then I saw a youtube video where someone had the problem that the cartridges are dried and the basket very licking the printer is turned. For me the problem was mainly in black and has almost no longer printed.
Did the nozzle cleaner with geliferten syringe reingespritzt in the nozzle zeiehn two hours leave cleaned. This Prozedure I made a total of 3 times and see. The printer prints black again without problems.