Same thing with bird “bombs”.
A good soaking is a must to soften it. Usea hose to try to shift it when soft. Be careful...there can be grit in the poo. If you try wiping it off you can get scratches. I keep a spray bottle with a mild soap solution to wet bugs/poo. Plenty of water to flush it with minimal wiping until all gone. Waxed surfaces are easier too.
