How to remove bird sh#t?

I like the idea of tending to any left behind acid so I don't have an etching surprise some time later on.
 
I've been using Meguiars QD and it was ok, but it has silicone in it and is it bad to have lots of silicone spots of all over or does it wash out when I wash the car? I like the Eagle wipe and shine QD but does it leave stuff behind like "teflon?"
 
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