Money back guarantee. Results guaranteed in 30 days. If you are not 100% satisfied within 30 days of purchase, return handle, refills & charger unit with original cash receipt to receive a full refund (full details inside pack).
Replace brush head when bristles are worn, or when color indicator bristles have faded to half way. Replace brush head every 3 months or sooner if brush head becomes loose due to damage. Dentists recommend that you change your toothbrush every 3 months..