For You Sir!
First you need to wash the potatoes and dry them very thoroughly with a
cloth, then leave them aside to dry as much as possible. If you're
using ready-washed potatoes you need not do this, as the high heat will
purify them.
Next, prick the skins a few times with a fork, then put a few drops of
olive oil
over each one and rub it all over the skin. After that, rub in some
crushed salt – this will draw out the moisture from the skin and,
together with the oil, provide more crunchiness.
Now place the potatoes straight on to the centre shelf of the
oven and let them bake for 1¾-2 hours, or until the skins are really crisp.
Enjoy!