Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Inaccurate

I have been using this thermometer for a week now with reading around 97.7 - 97.9 during the morning hours. I thought this was low so tried my temp later on in the day getting readings anywhere from 96.6 - 97.1. I bought a new thermometer today and my temperature reads just fine. This is a nice thermometer for what it does but I need accuracy to track my cycles.