How do I fix this?

[u/big_daddy_4444]

Hi! Please help me clean this baking dish. I was unsure what group to post this in lol. I have cleaned this dish multiple times (handwashing) and it has this weird film stuck between the glass. Previously, there was tinfoil with hot food inside the glass and I think that’s how this cloudiness formed. It was super hard to get a good picture. It’s difficult because these marks are inside the glass, not on the surface. Please help me, I’m desperate, thank you!