Epson C91 printer leaves white streaks when printing all over the page, what is the reason?

Question

Do it yourself

Epson C91 printer installed CISS with sublimation ink. Until recently there were no problems. From the beginning, the black ink supply tube burst, they replaced it. It does not always print a completely filled sheet. Now there are white horizontal stripes all over the image, especially in dark areas. What to do?

Answer 1

Throw away.
Or try cleaning the roller

Answer 2

what to throw out? which roller to clean?