Review on 🦎 REPTI ZOO Reptile Thermometer Hygrometer: Accurate Digital Alarm Thermo-Hygrometer with Probe & Suction Cup - Ideal for Reptile Terrariums and Aquarium Tanks by Anne Franson

I like that you can put the main sensor on one side and the sensor on the other side and the sensor also controls humidity (this is mainly for humidity control) but I can't switch to Fahrenheit. I know you have to use a feeler gauge to push something into the little hole on the back of the main sensor, but when I try to push straight down it looks like I'm just sticking some metal or plastic on the Meet bottom and there is no change. I also tried pressing on the sides because one of the videos shows a person entering at an angle, but it consistently feels like smooth plastic. It's not the end of the world being stuck in Celsius, but it would be nice to be able to change.