If you're wondering how to test if your non-stick cookware is still good, there are a few simple tests you can do at home.
One way to test is to simply cook with the pan as you normally would. If food sticks or doesn't slide around as easily as it used to, then the non-stick coating may be wearing out and it might be time for a new pan.
Another way to test is to sprinkle some water on the surface of the pan. If the water beads up and slides around, that's a good sign that the non-stick coating is still in good condition. But if the water soaks into the surface or forms droplets, that means the non-stick properties are gone and it's time for a new pan.
You can also try this cooking oil test: put a small amount of cooking oil in the middle of your pan and heat it over medium heat until hot. If the oil starts smoking before spreading out, that means your pan is ready for retirement.
So those are a few ways you can test whether your non-stick cookware is still effective. Remember, even if the non-stick coating does start to wear off, you can still continue using your pans - just be sure to use cooking spray or oil when cooking with them from now on!