I have this 30W desoldering tool from Velleman which I've used a few times without any issues... until I decided I wanted a finer nozzle.
Now the base becomes hotter than the tip, making it effectively useless since the tip does not heat up enough to melt solder.
The spare nozzle look like this: nothing special, just unscrew it and screw the new one in.
I know it' just a cheap tool, but did I do something wrong? I did have to use some force to unscrew the tip when I replaced it (fine, I used pliers) but could that have caused this defect?