Yellow's running low and your colour output's going muddy. You need the exact cartridge for your C510DN, not a 'close enough' third-party that leaves streaks. This is the OKI yellow toner, it slots straight in, and your prints go back to looking like they should
| brand | OKI |
| model | C510DN |
| toner_colour | Yellow |
| product_type | Toner Cartridge |
| category | Printing > Ink Toner & Ribbons |