[YuDanJa]

I thought you were referring to those dusty, yellow..."pollen", and was about to recommend you a California Duster.
Anyway, yeah... I steer clear from trees.

 

[YuDanJa]

Goo Gone (for cars) worked well removing tree sap on my previous car, but you gotta get'em before they completely dry up (or it'll just take more elbow grease)

I would NEVER use any laundry or dishwashing type detergents on a car

 

[YuDanJa]

There is a product I have used for many years...going back over 20 years ago...called Flitz...google it or view it on Amazon.com
They sell it in some automotive stores. Safe on paint, works on chrome...it's awesome. Made in Germany I think. I have used it on cars to remove light oxidation and it deepened the color of my paint.

I always thought of Flitz as a polisher than a 'sticky goo' remover or degreaser. It is an awesome product, though. I use it on firearms.