For a cleaner, fresher, brighter denture. Deep cleans tough stains. Micro clean formula. Kills 99.99% of odor-causing bacteria to help freshen breath. Works in denture surface pores (Polident Overnight Whitening MicroClean Formula preparation helps remove stubborn stains and kills 99.99% of odor-causing bacteria. For best results in surface pores, soak overnight as directed. Use Polident cleanser daily for a cleaner, fresher and brighter denture). Polident kills bacteria brushing can miss. For your oral health.