Thanks for letting us know this, Cathy! Your satisfaction means a lot to us, and our products go through many quality checks to ensure that each one reaches you in perfect condition. We're so sorry that wasn't the case with your recent purchase. Toothpaste may become thin and watery if exposed to heat for a long time - however, it is still safe and effective for use. The information you've provided is quite helpful, and we'll ensure it's shared with our Quality Assurance Team to look into further. So that we can help with your purchase, please call us at 1-800-492-7378, M - F, 9 a.m. to 6 p.m. EST.