Hi Sammy. Thank you for trying out Simple Drain. We have live customer service during business hours and quick email response during off-hours to assist you if you ever have questions or problems. The dishwasher connection is outside of our control to some extent. We offer a barbed fitting that works with most dishwasher drain tubes when properly clamped. As we do not make the drain tubes nor do we supply that clamp, it is hard to control what every final connection looks like. I'm sorry that yours was not ideal. Most white plastics and rubber compounds will yellow in dark spaces over time. We have adjusted our formulation this year to improve long-term brightness, but it is purely cosmetic. The material itself is made to outlast the rest of your sink components. Simple Drain is designed to be a permanent solution and will stand up to impact and vibration under a kitchen sink better than hard plastic trap kits over time. If you would like to give us another shot, please reach out to us and we'll send you a free single basin kit to use in a bathroom. 800.654.6858 or simpledrain@crushproof.com