Thanks for you reply. I did as suggested and removed the cover to access the strip and cleaned it but the problem continues. I thought I could clean the encoder sensor but access is a bit tricky.
I printed a nozzle check pattern as requested before cleaning the strip...
I have an epson stylus c84 and recently it started having some printing problems with the black ink.
Prints are presented with many white lines and text looks misaligned.
I scanned some page to show you the problem:
https://i.imgsafe.org/a022fd3b16.jpg (white lines)...
My name is Paulo and I'm from Portugal. I own an epson stylus c84 that has served me well for quite some time until a few days. I hope that with your help I'll be able to fix it and make its lifespan a little bit longer .