Image source: unknown. The mashrabiya, an ancient Arab invention, is used in the Middle East to passively cool buildings and provide privacy from strangers. Not everyone can afford architectural additions or frosted glass, but there is a simple Scandinavian trick to achieve a similar effect. By applying a few coats of yogurt to your windows, you can create a fritted or frosted glass appearance quickly and affordably. Yogurt can be easily applied with a roller brush, is odorless, insect-resistant, and can be easily washed off with water. This DIY solution is perfect for temporary privacy needs or heatwaves. For a more permanent solution, acrylic paint can be used, but it is harder to remove. Get creative with your frosted glass designs using yogurt and enjoy a cooler, more private space.