Solved it.
In case anyone is experiencing the same issue, here is the solution:
Double-click each wire with a line next to it, and in the dialogue
1. Select "Single line" (will deselect Multiline)
2. Deselect all three "Ground", "Neutral" and "Phase"
3. Hit ok.

For a new project you can also set this in the configuration under "New Project" > "Conductor"

Hey everybody.
I just installed QET and tried using it to draw some basic circuits.
I connected some things by clicking the first terminal and dragging a connection to another terminal.
Now I've got a connection / wire, but also a small line next to it (I added the red outline afterwards):
https://i.imgur.com/sKEqynx.png

They also appear in an exported png.
Am I doing something wrong? How can I remove those?

Thanks for any help in advance.