In 55-60% humidity or more you will start to form fog and then water on outside of glass door, this is normal is glass door fridge operation. A lot depends on the tyoe of glass, if you have special LOW E glass it helps prevent up to about 75% and heated glass gets you to 100%.

Click below for information on condensation.
Link;
https://www.bar-fridges-australia.com.au/the-facts-about-condensation-on-glass-doors-of-bar-fridges.html