Adhesive pins serve as handy tools to maintain the cleanliness of adhesive nozzles and caps during the shaking process. By inserting these pins into the nozzle before shaking the adhesive bottle for 10-15 seconds, they prevent glue buildup or residue on the nozzle and cap. This proactive approach ensures that the nozzle remains clean and clear, allowing for smoother and more precise dispensing of the adhesive during subsequent applications, ultimately contributing to a cleaner and more efficient work process for lash extension procedures.