Bisetti"s cooking stones are ideal to grill meat, vegetables, cheese or other food, using just a drop of oil: once heated up on the cooker, they can be directly placed on the table as cooking surfaces, by making use of a little cooker to keep the obtained heat constant. But, before using the stone for cooking, it must be subject to a preventive treatment. This latter is only required once before using it for the first time and has not to be repeated: the use itself of the product will serve as maintenance. Once completed the treatment, the stone will change color from light grey to black. To clean, simply use a sponge, rinsing the stone under warm running water. Any dry residue can be removed using a sponge with salt, without using abrasives.