Make sure you always have a fresh brush head. Regular replacement is key to maintaining the full performance of your TriBeam Edge™ LED Manual Toothbrush. Each brush head features firm-tip, comfortable bristles designed to work seamlessly with the TriBeam Edge™ Light Guides, ensuring optimal light flow through the bristles with every use. Replace every 30 days for best results and pair with Smileactives® Pro Whitening Gel for a complete whitening routine.