Why clean dentures with Polident Smokers Denture Cleaner instead of toothpaste? Toothpaste contains abrasives that can scratch dentures. Bacteria can grow in scratches, which can cause bad breath. Polident Smokers Denture Cleaner kills 99.9% of odor-causing bacteria and other microorganisms. Denture hygiene is an important part of good oral health. Use Polident Smokers Denture Cleaner instead of toothpaste every day for clean dentures and a healthy mouth. ExpirationThis product has no expiration date or the manufacturer has not provided an expiration date.