Oil the cast iron

Oil the cap and the cast iron

The manual and the 2019 FAQ.

1. Leave the grease film that forms on the cast-iron cap after a few cooks. It protects the iron and stiffens the cap so it does not move by itself (2019 FAQ).
2. Oil the charcoal grate thinly now and then (the manual).
3. Oil a cast-iron grid or plancha thinly after brushing.
4. If any cast iron rusts: wire-brush it, oil it and burn it in at about 250 °C (2019 FAQ for grids; this guide applies it to the cap by the same logic).