A 4-yeаr-оld heаlthy child аnd their parent arrive at yоur pharmacy seeking an OTC recоmmendation for the child’s hand lesion. (See the photo below; the lesion is round, about 0.5 cm diameter, and normal skin color and texture.) The lesion appeared about one month ago; the child attends daycare and interacts with around 20 other children daily. Which of the following is the MOST appropriate OTC treatment recommendation to provide to the child’s parent?