Overheated stainless saucepan - food now sticks
Googling "Stellar non-stick stainless steel saucepan", I read that it has a coating of polytetrafluoroethylene or PTFE - Teflon being one of the brand names people are most familiar with for this product. Stellar Non-stick Cookware reads


  Never use a non-stick pan on full heat - overheating it will almost certainly damage the coating. ln fact, many more nonstick pans are damaged by being overheated than by being scratched.


Sorry to say but non-stick coatings that have been over-heated are damaged and can't be salvaged.