make sure that you knick the stream a little bit so that the water is evenly dispersed from head to end of stream. unless you have incredible pressure you should do this to all your heads. Just take your key and tighten the screw right above the nozzle. just turn it clockwise until it Just touches the stream and you will see alot more water in the middle of the stream. not necessary if its just the angle of the head causing spot
proper head orientation is crucial too, heads spraying strait up almost do almost nothing but waste water on one side,and spray 7 ft on the other. give it a quick straighten youl probably be good,if you have good pressure,increase the nozzle size a bit until it greens back up,or forever doesnt matter to much, technically it does but it really doesnt lol. a 2.7 gpm to 3.4 isnt the end of the world, but it will green up your dry spot.