We appreciate you reaching out and we're sorry to hear that you're having difficulty with stains on your white sink. Our goal is to ensure our customers are completely satisfied with their purchase, and we're here to assist you.
For your quartz sink, you could start by using a Magic Eraser with warm soapy water, as these are generally safe and can effectively remove stains from a variety of surfaces.Once the sink is clean and dry, it may be beneficial to apply a thin layer of Luster Pro Light Oil overnight. This product helps to create a protective layer on the surface that can help maintain the cleanliness of the sink and prevent future staining.
Please reach out to us at info@karran.com if you still have difficulties with your sink, we will be more than happy to help you.