I also notice that the photoconductor is covered in black toner - see here:
https://photos.app.goo.gl/3gZDyLvayKC1hFQT9
If I I wipe it clean and print another page it's covered in black toner again. Is this normal, or could it be that toner has leaked from the black toner cartridge?
I recently replaced the black toner cartridge on my Epson CX11NF multifunction, It's been fine for a few weeks, but is now smearing every printed page with a large streak of black/grey toner - see image here:
https://drive.google.com/file/d/1zNMiu0T-OWfDOf2RRzVP2990hAc1LFOi/view?usp=sharing
I...