In order to keep your car interior fresh and stain-free, we recommend using professional car valeting services at least once every 3 to 4 months. This will prevent any stains from setting in, as well as any sand wearing out your carpets and mats. Additionally, the longer you leave any spillages unattended, the less the chances of removal, even by professionals. For this purpose, it is very important to have your vehicle deep cleaned regularly.