We do not add any fragrances to our products, but silicone can retain the smells of foods or soaps it comes into contact with. We recommend that the silicone is not soaked in highly fragranced soapy water and that a mild detergent is used. To remove smells, use equal parts vinegar with baking soda and let your straws soak, then give them a good scrub with the straw brush. Afterwards, boil them for 10 minutes to make sure they are completely sanitized.