I bought a brand new hard anodized pan for making roti. I used some oil while cooking. After cooking, washing I saw these stains (most likely grease) that would not be removed after washing with my usual dish washing liquid.
I heated the pan hoping that oil would come off. It didn't.
Then I gently scrubbed vinegar soaked toothbrush on the greasy spot. Some of the grease got removed, (50%) but it remained there in other spots.
Is my cleaning process correct?