Which of the following is NOT a method for cleaning and disinfecting a contact lens case?

Using boiling water to disinfect a contact lens case is considered a method that can potentially damage the case material, making it not ideal for effective cleaning and disinfection. While boiling water can eliminate many pathogens, it can also warp or weaken the plastic used in many lens cases, reducing their effectiveness in safely storing contact lenses. Additionally, this approach does not adhere to best practices recommended by eye care professionals.

Soaking the case in disinfecting solution and rinsing it with tap water might introduce contaminants from the tap water, which is why it's not a recommended method. Keeping a case sealed and storing it in a dry place is less about cleaning and more about proper storage; moisture can lead to bacteria growth. Allowing the case to air dry completely before reusing is indeed a recommended practice, as it ensures that any disinfectant used is fully removed and any moisture is evaporated, preventing bacterial growth.