We are sorry to hear that you had problems with some of the sensors that were in your order. We just sent you an email with information on getting warranty replacements for the bad sensors. Please let us know if we can be of any further assistance.
“We depend on them to get my wife's blood sugar numbers accurately on a regular basis. It allows her to keep her blood sugar under strict control so as to limit further damage to her organs while preventing a low sugar event. Wish we had it 40 years ago. Her health would be much better now if we had it before.”