Help, I can’t remove the booster Moisture between the two walls could create a vacuum making the booster difficult to remove. Pull the silicone band up to release the vacuum. This will enable you to remove and clean the tritan booster. Have more questions? Submit a request Return to top Related articles Care- KeepCup LongPlay How do I clean my original/brew KeepCup? Help! My cork band is broken Help! My KeepCup smells How do I use my KeepCup?