Final answer:
The gloves should be removed last by the ST in the scrub role to prevent contamination at the end of a surgical procedure.
Step-by-step explanation:
The ST in the scrub role should remove the gloves last in order to prevent contamination at the end of a surgical procedure. This is because gloves are in direct contact with the patient and various surfaces during the procedure. Removing them last helps to minimize the risk of transferring any potential contaminants to the surgical site or the healthcare worker's hands and clothing.