These placemats are made of woven material. There are some small gaps and sometimes stains get stuck in the gaps again. So don't worry, it's normal. We offer you the following solutions. 1. Rinse with relatively strong water pressure for a while and it will be a perfect solution 2. Wipe slightly harder with a water-soaked handkerchief and the problem will be solved. 3. If it is something like soup, rinse gently with water Decorate your table to prevent stains and spills and to protect it from the temperature. PVC material no fading，heat insulation and durable,stain-proof and easy to clean,suitable for various dining scenes. Convenient storage foldable,curl storage,convenient and simple storage does not take up space