If the limescale persists, wrap the showerhead in a plastic bag and leave for another hour. Then wash it thoroughly.
Irons
1. Cover the ironing board with paper and sprinkle on a little salt.
2. Turn on the iron and switch it to maximum heat. (Make sure the steam function is off, and that there is no water in the iron).
3. Rub the heated iron over the salt. All the dirt of the surface will come of quickly and easily.
Cast-iron frying pans
You will need an oven cleaner, rubber gloves, bin liners and plain vinegar. Detailed instructions can be found here.
Mold on bathtubs
Take some cotton wool and make small balls with it which are approximately one centimetre in diameter. Dip them in a bleach, place them on the mold and leave it all over night. In the morning, remove any remaining mold with a toothbrush.