A 52-year-old patient presents for their recall appointment after initial scaling and root planing (SRP) therapy completed three months ago. Upon re-evaluation, the dental hygienist observes persistent bleeding on probing in several sites that previously had 5-6mm pockets, though pocket depths have decreased to 3-4mm. The patient reports improved home care, but still occasionally misses flossing. Which of the following is the most appropriate next step in managing this patient's periodontal health?