Ok, so I have this safety 1st ear thermometer that reads in 3 seconds. It still works fine and everything, this morning my daughter got a fever, I took her temperature in farenheit. Later I set the thermometer down, gave her some infants tylenol, cold head rag, pretty much anything to help the fever go down that a doctor would tell you to do. 15 mins later I pick up the thermometer to check her temperature only this time its reading in celsius. I dont know how it happened and I threw the sheet that came with instructions on it away *i knew I shoulda kept it >.<* if anyone has a safety 1st ear thermometer and this has happened to them and they managed to turn it back to farenheit please please help me out. Thanx :-d!