First of all a BIG thank you to our fearless lab manager, James, for cleaning the soldering irons. We should get more consistent results and properly hot irons thanks to his efforts.

AND, for the common solder type that we use 60/40 or 63/37 rosin core solder that we use in our projects, a typical melting point is around 190 Celsius. According to the Adafruit site, it is recommended that you operate your soldering iron around 370 Celsius.