Dear Rial, Thank you very much for sharing your experience with us. We truly understand your expectations regarding the whitening effect. This teeth whitening strip is specifically designed for at-home daily care, and its gentle nature requires consistent use over a period of time (usually 1-2 weeks) to achieve more noticeable results. The sample pack you purchased is intended to help you get familiar with the product's texture and fit. We sincerely invite you to continue using it for a full cycle—we believe you will be pleased with the outcome. Should you have any questions about usage, we are always here to assist.