Spoon Marks Inside Coffee Mugs

Thank you Lizzyanny, Leapord and halfwhit.I have just received your response and will try anything, I expect it will take me a few days to try them and I am sure to get back to you all and let you know what works.
Thank you
Lucky Me

A scouring powder called Barkeepers Friend is great for this. I have some small white bowls that so the same thing.

Baking soda and water, or sos (steel wool) pads work on coffee and tea stains.

Try the new fangled sponges that clean just about anything. I use 'em on my floors (scuffs), on my dry erase board, on my refrigerator that had the plastic wrap marks on it from delivery, those things clean just about anything. Good luck!