To remove dead skin cells from the body in a spa, you can opt for a body scrub, which is a popular spa treatment that involves using an exfoliating scrub to gently remove dead skin cells. Another option is dry brushing, which involves using a natural-bristled brush to exfoliate the skin and improve circulation. Additionally, chemical peels are a more intensive option that use acids to remove dead skin cells, revealing smoother, brighter skin. Whichever method you choose, be sure to follow the instructions of your spa therapist and take care not to over-exfoliate.