Your highchair should be cleaned soon after each use and you can simply wipe down the surface with a damp cloth. It's also important to regularly clean any food spills, residues, or crumbs from the seat of your chair and around your baby's tray. To remove stubborn stains, try using gentle dishwashing soap and warm water before wiping everything down. Once a week, you should also be checking underneath the seat and other places where your baby might have their hands or mouth to ensure that there are no stains, smells, or signs of mold. If anything is detected, it should be cleaned immediately.