We don't like to hear that, Jeff! Certainly, it is important to thoroughly shake Rust-Oleum Varathane Water-Based Ultimate Polyurethane Spray prior to use, and occasionally during use as well. The can should be shaken for no less than one minute before each use. This ensures that the product is mixed well, and prevents larger particles from being sprayed through the nozzle.
You also want to make sure the finger that presses down on the nozzle stays clean and free of any paint. It is important to have your index finger centered on the nozzle itself. If your finger is too forward, it can cause some blocking of the spray mist as it comes out of the can, which can cause sputtering or larger drops to be sprayed on the surface.
- Rust-Oleum Product Support 3