Cyan prints are streaking. You're getting faint blue lines or a muddled colour cast on every page. The drum unit behind that channel is worn out. This genuine OKI cyan drum for your C831N drops straight in and clears the ghosting. One swap, clean colour, done
| brand | OKI |
| colour | Cyan |
| type | Drum Unit |
| compatible_model | OKI C831N |
| category | Printing > Ink Toner & Ribbons |
