How to remove bird poop off painted fence without removing the paint?

A soft scrub brush and soapy water could do the trick.

Hi Pen,

The first thing you want to do is wet it with a hose to prevent the release of spores from the bird poop. Here's the rest of the article to help you know how to clean it - even if there are tough spots.

https://www.hunker.com/13424837/how-to-clean-bird-droppings-off-wood-fences

If the fence was properly painted pretend you are washing a car, but don't need to worry about fine scratches. A garden hose end dispenser/sprayer, Dawn dish liquid, a garden hose, and a nylon brush should do the trick.

To reduce future occurrences, do something to deter birds from perching on or above the fence.