Bird dropping contains strong acid than you think. If you leave it, it causes peeling or crack of the paint. Dead bug is also damaged paint.
This is soiled thing but remove immediately for your cherished car.
If possible, use car wash wipes. It can remove excellently with cleaning ingredient without damaging the paint.
Do not rub the paint even this is wet type. The tip is cover the dirty area until it becomes sodden and gently wipe it.
We have exclusive wet wipes contained orange oil which is effective for removing dead bugs or bird dropping.
Suitable for long drive in summer night.
In case of hardened dropping or dead bugs, it may not remove with wet wipes.
Then do not rub it forcedly. Put the towel with pouring hot water (around 80℃) and leave it. Must be removing the dirt easily.
Beware of getting burnt.