How to remove coffee stains from carpet with Oxiclean or peroxide. In this video I show you how to remove a coffee stain in seconds using peroxide or Oxiclean if you are in the USA. To remove the coffee you will need Oxiclean or Hydrogen Peroxide. If the carpet is made of wool you will also need vinegar to neutralise and stop the oxidising reaction from damaging the carpet or rug.