A 32-year-old woman presents with severe pruritus, worse at night, affecting her wrists, interdigital spaces, and axillae for 3 weeks. Examination reveals linear burrows and erythematous papules. Her 6-year-old daughter and husband have identical lesions. KOH mount of burrow scrapings shows mites, eggs, and fecal pellets. What is the most appropriate next step in management?