It was easy to apply to my back window. I placed it at the bottom of my window were my wiper blades it and I've gone over it a couple time and washed it and its stayed put. Just gotta test it out in the car wash to see if it stays.
Keep us posted on the car wash! I had mine on for years with no issues, but fingers crossed you have the same experience!
Makes me happy when I drive!
Great Decal and service