Ensure the hob is switched off and cooled down. Remove all coarse dirt and food residues using a glass ceramic scraper, then apply a few drops of a specialist ceramic hob cleaning product (usually available in shops) using a soft, clean cloth. Wait a few minutes for the product to take effect and then remove it using the scraper. Wipe down the cooktop with a damp or wet cloth so that any residues from the cleaning product are completely removed. Finally, dry the cooktop with a clean cloth.