Here is a trick that you might not have heard of: put two or three vitamin C tablets in the toilet and let the dissolve for about two hours, scrub with your toilet brush and flush the stain away.
Remove limescale by filling the reservoir with a solution of clear vinegar and water. Leave for an hour or two, then empty and rinse out with clean water. Check the manufacturer’s instructions carefully first however, as this could damage some self-cleaning irons.
Here is a trick that you might not have heard of: put two or three vitamin C tablets in the toilet and let the dissolve for about two hours, scrub with your toilet brush and flush the stain away.