Complan has turned the cup brown – what is it doing to my insides?
If left unwashed, a cup which has contained Complan may have some brown residue. Complan contains iron and in certain circumstances this can react with organic compounds, which are then absorbed into ceramic materials. These stains can be removed using a proprietary cleaner (such as a Stain Devil) which contains EDTA. This forms a chelate with the iron making it soluble. The seal on sachet is faulty Thank you for brining this to our attention. Please send the faulty packaging to us and we will make sure that the factory investigates.