Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Inaccurate, waste of money

7 out of 10 scans say "error" and the scans that do get a reading differ each time. 99.4, 98.6, 99.7... I've read the instructions a dozen times and know it's not a user error. Also a selling point for me was that it could be used while our baby is sleeping. It leaves red marks on his forehead and plastic is too hard and requires just enough pressure to wake him. So it can't be used while he is asleep. I thought we just had a lemon but my sister has the same one and has the same problems.