What should be done with the protective lining used in the sink?

Disposing of the protective lining in the trash is the appropriate action because it ensures that any contaminants are safely contained and do not pose a risk to anyone who might come into contact with them later. Protective linings are often used to maintain hygiene and prevent infection during procedures, and proper disposal helps to adhere to best practices in infection control.

Using it again or setting it aside for later use could lead to cross-contamination and compromised cleanliness. Flushing it down the toilet is not suitable as it may cause plumbing issues and is not an environmentally responsible method of disposal. By discarding the protective lining appropriately, you contribute to a safe and sanitary environment in health care settings.