That is ok.
I have experienced what I described and others may have other experience......only time will tell.
End-of-life is a critical part of the technology product lifecycle
This is a test-print 10 x 15 cm printed after Nozzle Checks, new refilled cartridges with mixed dye-ink from different suppliers. Scan is done with the same printer - MG7550
It takes time to desolve cloggs......
This is my recent Nozzle Checks with an old printer(MG7550), then after 24 hours and finally after additional 48 hours......soaked in Ajax Kitchen
I am located in Norway.
"Ajax is a brand of household cleaning products and detergents made by Colgate-Palmolive. The brand is also licensed by Colgate-Palmolive in the United States, Canada and Puerto Rico.[1]"
https://en.wikipedia.org/wiki/Ajax_(cleaning_product)
It feels like I have tried almost every dissolver mentioned in forums, FB-groups or Youtube during the past years, but when it was time to unclogg my Epson 4900 I realized I needed something more "powerful" fluid to clean the inklines inside the printhead. Ajax Kitchen....did the job thoroughly.
Yes, it looks like it has printed less than 50 pages with OEM ink and stayed unused for a long period. Try cleaning printhead with "Ajax Kitchen" over night and then flush & dry...