Have you tried Colgate Pro Clinical Toothpaste yet? If you do try it and you’re not completely satisified with it, Colgate is offering a money-back guarantee on their site HERE (lower left, click on the “Satisfaction guaranteed” button). Terms: If you’re not completely satisfied, return your original cash register receipt, UPC code from outer carton within 60 days of purchase for a full refund. Print your name and address on the back of the receipt along with a brief explanation of why you were dissatisfied. You’ll receive a check in the mail within 6-8 weeks for the purchase price up to $3.99. Offer limited to one name/address per household.

Mail your request to :
ProClinical Satisfaction Guarantee Job #416
PO Box 49214
Strongsville, OH 44149-0214

I love these kinds of offers, it gives you a chance to try new products risk-free!