Digital BW, The Print

Hi, in the otherwise perfect nozzle pattern there are 2 single nozzles
clogged - at least 2 of the little lines in the nozzle pattern are
permanently and 100% absent: No purging cycle helps, I laid a inkjet
head cleaning fluid-soaked towel under the printhead, it didn't go away.

The 2 missing nozzles are on the second color from the left (cool
tone?) and on the one that prints on the right of the pattern. What
would you recommend to do next?

In prints it hardly shows up on matte paper, but on semigloss its not
really possible - it shows up clearly.

Thanks,

Bernhard