Stainless steel pan staining

[Shadowhunter12]

I bought a new pan set yesterday and used one to heat baked beans (classy I know!) and have washed it with warm water and washing up liquid and a sponge. What is this staining and how do I get rid of it? It wasn’t a cheap set.

Cillit bang works on my stainless steel pots. Think it's from the water.

Thank you. Fingers crossed!

I had the same thing just last week. I was heating my stainless pan on my induction stove before putting oil and it got the same marks as yours. I just washed it normally and it mostly disappeared, though there were a few faint yellow stains left if you look closely, maybe from previous use.