Know that your biological indicator works with your sterilizer!!! Many variations of Attest, for example, exist. It must be appropriate for your sterilizer. Sometimes we tell surgery centers about certain guidelines that are out there and not everyone believes us. But, if you have an “educated” surveyor, they will know that your glutaraldehyde or OPA must be at a certain temperature according to manufacturer’s instructions. First, know the temperature and second, have a method of monitoring it! If you hand-wash GI scopes, follow your policies and that of the manufacturer.