Hello, Thank you for taking the time to leave a review. We’re disappointed to hear that your vessel is staining and not coming clean, that’s definitely not the experience we want for you. We understand how disappointing it is to feel that a product isn’t holding up in quality. We also apologize for any frustration you’ve experienced regarding replacement options. Your feedback are incredibly important, and we’ll be sure to share this with the appropriate team review. If you do require further assistance, please feel free to contact our support team via the link below. We are always ready to assist and ensure your experience is a positive one. Contact Page: https://support.sharkninja.com/contact-us Kind Regards, Ninja Kitchen