If you use a steel nozzle, you must increase the temperature by 15 to 25°C depending on the case. The “nozzle temperature compensation” function saves you from changing your profiles: [...]

For “simple” PETG, i.e. not loaded with other materials. A brass nozzle is a good choice to keep the best performance, or better yet, a Copper-Nickel nozzle (more resistant). A [...]