Final answer:
When disinfecting a foot spa, drain the water, remove foreign matter, clean surfaces, refill with clean water, replace filters if necessary, and dry with a clean towel.
Step-by-step explanation:
When disinfecting a foot spa after a client, you should follow several steps to ensure proper cleanliness and hygiene. After draining the water and removing any foreign matter, it is important to clean the surfaces using a disinfectant. This step helps to kill any remaining germs or bacteria that may be present. After cleaning, you should refill the spa with clean water and replace the spa filters if necessary. Lastly, it is important to dry the spa with a clean towel to prevent the growth of any remaining bacteria or fungus.