We've had a Baccarat Granite non-stick frying pan for a number of years. It's been just fine with my style of cooking, low and slow and watching the food. Since my wife started working from home at the start of the year, there's been a number of occasions where the house was filled with smoke after she used the frying pan. Her technique seems to be high-heat and get distracted. :-(
The pan surface is no longer non-stick and it has a black coating on the areas that come into contact with food. I suspect that this black film is polymerised oil residue. This layer is well attached to the pan and when she cooks, everything sticks to this black surface.
To clean this off, I tried a nylon scourer as well as Tricleanium (trisodium phosphate) and neither has helped. A quick test with stainless steel scourer in one spot appeared to get the black layer off the surface, but it also removed the non-stick coating, so that's a no-no.
Any tips on how to restore the non-stick properties of the pan? The Baccarat Granite pans are cast aluminium with a hardened non-stick coating.
Once the non stick coating is compromised you need to get a new pan, there is no way to restore it.
If you had a stainless steel pan you could just reseason it from scratch, but once a pans non stick coating is compromised then the non stick component actually gets infused in your food. Replace it.