How can I protect window air conditioner from bird droppings from above?
For a long time I had several window ac units and had a similar issue with pigeons, a guy down the street raised them and they loved my house for some reason, I found a piece of sheet metal at an angle kept them from landing on them and when they perched on the gutter as they start to fly they would poop, the angled metal worked I used self adhesive Velcro to hold it in place, when it came time to pull them in the winter I popped them off and cleaned them in the bathtub, I did have to paint 2 of the 3 on the 3rd or 4 th year and after that I found motion activated sprinklers (I still use those today to keep birds out of my pool).