PIXMA G3420 "Printout is grainy or noisy"

[bayoii]

I am using a Pixma G3420 series. currently my printouts became grainy or noisy both in plain paper or photopaper. do you have any idea or solutions to fix this? I tried cleaning, deep cleaning, and the most of the maintenance.

This is the reference photo

Reference Photo

These are the print results

Current PrintoutCurrent Printout