A 15-year-old male presents to the school nurse with complaints of persistent itching and redness in the groin area for the past two weeks.Upon assessment, the nurse observes a well-demarcated, erythematous rash with a scaly border extending from the inguinal folds to the upper inner thighs, sparing the scrotum and penis.The student reports being on the school's wrestling team and frequently wearing tight-fitting athletic gear.Which of the following interventions should the nurse prioritize?