My answer is going to be a little different and may sound odd to you, but I'm a mom of a 14 and a 10 year old so here goes - why use a thermometer at all? Seriously. You're an experienced mom of five. You dont' have an infant. Why do you need to know what their temperature is. You know when your kids have a fever. If you treat a fever with medication, does it matter whether the fever is 101.4 or 103.2? The treatment is still the same. It's typically the other symptoms that you go to the doctor for (ear pain, sore throat, etc) - doctors typically don't get alarmed about a fever of a certain amount unless the child is listless, can't drink anything, has a seizure. My kids haven't had their temperature taken at home since they were about 4 years old. I realized that I didn't need to do that to know whether they had a fever.