Unpleasant after-taste - Toothpaste

Colgate Maximum Cavity Protection, labelled Fresh Clean, lately has a unpleasant after-taste. It has a bitter taste, which we have experienced. We have purchased several tubes of toothpaste (4 or 5) and sampled the taste on several of the tubes, which is the same bitter after-taste.<br> <br> Could you kindly arrange to exchange the tubes as my family refuse to use the toothpaste.<br> <br> You kind attention to this matter would be much appreciated.<br> <br> Regards<br> <br> Mike Matthews