First clean off the affected surface with a mixture of sodium bicarbonate, vinegar and hot water. You can easily buy sodium bicarbonate and vinegar at the local supermarket. Once the affected surface is clean, fill a clean spray bottle, that you can also buy at the supermarket or homeware store, with water and add the half a teaspoon of clove leaf essential oil to it. Spray on the mould-affected area, leave for half an hour before wiping clean. Immediately spray again and leave the clove leaf oil mixture on this time to allow any remaining mould spores to dry and drop off over the next couple of days.