Please keep in mind that they are
aluminum. There is an anodized, hardened surface - that is microns...
only microns thick.
That is not a criticism of the product, I love mine and use them regularly. It is a reminder to all that you should NEVER "clean" them with anything that can abrade, scratch, cut, or otherwise damage the surface. This would also include the type of tools you use to flip or remove food from them.
Why?.... Because the anodized coating is what prevents the coating from oxidizing under the heat/cool stress we place on these as pat of their normal use. Aluminum in your food is NOT a good thing. When we change the conductivity of our bodies via introduction of metals - above and beyond their design intent
....we risk exacerbation of any genetic proclivities for a group of neurologic disorders which all fall under the general term "dementia".
An absolute "risk" for everyone? I don't think so...but the more that is learned about metals in our food and water supply - the more that neurologists claim the link for such is growing stronger.
Just an advisement, suggestion and desire that all use a degree of prudence in the the use and care of their grates - they are a great product.