As with any strategy that involves spraying a substance in your home or near open windows, there are certain risks to be aware of. For example, if you are allergic to any components of water or cinnamon, you may experience unwanted side effects. The container of the sprayer should be well sealed and out of reach of children.
Applying a spray made of alcohol, coffee, cinnamon and water to the windows can certainly help eliminate annoying insects in a natural and inexpensive way. However, it is important to carefully weigh the risks associated with the application before using it. Always remember that prevention is still the best strategy to prevent an insect infestation in your home!