https://www.escentialsofaustralia.com/search?q=cinnamon+oil
https://www.escentialsofaustralia.com/products/productid376?_pos=1&_sid=966d0ffc4&_ss=r
During winter and damp weather we often find mould in and around the house, especially in bathrooms, laundries and on windows. A few drops of Cinnamon Bark oil mixed with water in a spray bottle is a must have in the battle to eradicate mould. Spray on the mould and leave for at least an hour in order for the oil to soak into the mould and then wipe it off with a sponge or cloth. Make sure your keep mould prone rooms properly ventilated too or you will keep having the problem. Cinnamon oil is a skin irritant so handle with care.
White vinegar is another important mould inhibitor that can be applied either neat or in a solution of water and white vinegar in a spray bottle. However white vinegar will not kill mould on porous surfaces such as carpets and rugs, so it's best to remove them. According to online sources white vinegar is the front line defence against mould followed up by using Cinnamon oil, or you can combine them in the spray bottle. It is worth noting that Cinnamon oil is used small scale not a large scale mould infestation, and both vinegar and Cinnamon oil are not a permanent solution either you will need experts for serious infestations. People are also using dehumidifiers in the battle against mould but again it doesn't prevent mould completely.
https://mouldcleaningaustralia.com.au/blog/will-a-dehumidifier-get-rid-of-mould-in-your-house
If you are in your own home and not renting it is worth painting mould prone rooms with paint that has mould inhibitor in it. Paint the ceiling, cornices and walls with this paint, but above all is proper ventilation. If you are in a rental house it is the landlords responsibility to remove any mould to prevent illness. Depending on what country or state that you live in you need to look online to see what laws protect your rights as a tenant.
Symptoms of mould illness are, itchy watery eyes, a blocked nose and sinus congestion. Wheezing and breathlessness, cough and throat irritation, skin irritations and headaches. Left untreated serious illness can occur. Blood tests and urine tests are usually the first step in detecting mould infections.
Update : Clove leaf is also used to kill mould. I just forgot to add this to the post. The link for the price is at the top now too.