The Issue?
If you are having issues with your solo sprayer not spraying or having difficulties keeping up, it's most likely due to a vacuum issue. One way you can be sure of that is if you unscrew the bottle and it makes a slight Hissing Sound, almost like opening a soda bottle.
Solution?
Just follow the steps below:
1. Unscrew the bottle from the head of the sprayer
2. locate the small green pressure relief tube on the red collar of the sprayer head.
You'll notice the very small opening in it. What we need to do is make it slightly bigger.
3. Get a small (Really Small) flathead screwdriver or other sharp object and slightly cut the corners of the green pressure relief tube.
The goal is to open it just enough to let some air in, but not enough that liquid will get into the head of the bottle.
Summary
Doing this will most likely void your warranty, so proceed at your own risk.
Give it a test after you've done that, and if you're not having any issues, the problem is solved. If you do continue to experience issues, let us know.