Cleaning bird droppings, especially on balconies or windows, is quite difficult, especially in winter. This is because the dirt sticks more to the surface due to the cold. To clean this dirty surface, you can use warm water. Warm water makes it easier to remove the dirt. Leaving the warm water on the dirt for a while also helps to remove it. This method is more effective for heavy dirt. Another method is to use a toothbrush to remove the remaining residue.