I found this really old jam jar somewhere in the attic. It had a residue of labels and a yellowish tint.
I asked chatGPT and it suggested me to add some vinegar and baking soda to make it shine and good as new, hacked.

How is your jam preparation going?

Update 1:

Whoah! ChatGPT to the rescue. I made some bread for the jam to go on. Does that count?

Good as new! That worked really well. Now you can make some homemade jam to put in it 😉 

That is a good-looking jar, how much are you selling it for?

I hope it still has the lid though