Bags of water . You will surely have noticed bags full of water hanging on balconies or terraces. This is a method as ancient as it is effective and consists of filling a transparent plastic bag halfway with water and hanging it near windows or balconies. When the sun’s rays pass through the envelope, a prism is created which is hated by flies. The same goes for CDs hanging on balconies or windows.
Lemon and cloves . This is a very effective and simple remedy to prepare. Cut a lemon in half and insert a dozen cloves into its pulp. Place lemons at the entrance to the balcony or on the inside windowsill.
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