To get to 3 story, we can use a "shooter tip" with a 3' wand (see picture to top of chimney). This tip allows you to draw down stream solutions. Remove or turn off draw for rinse.
If your equipment does not the power to reach or you need a bit more reach, buy an aluminum lance (~7' long and weights about 2 lbs).
We also use 1 or 2 lances to reach 2 story ceilings / soffits with a 25 degree tip to get rid of wasp and mud dauber nests (southern US) - use caution depending on type of surface.