If you want to feel fancy while fighting crust, use lemons. Boil a few thick slices or squeeze the juice into the kettle. It works on the same acid principle, but your kitchen smells fresh and clean.
Just watch out: lemons are a little gentler, so really hard, thick scale might need two treatments. But the effort is worth it for the scent alone. You’re basically aromatherapy-meets-plumbing.
