Thin your paint: Thick paint can cause the sprayer to spit and splatter. Use a viscosity cup to measure the thickness of your paint and thin it according to the manufacturer's recommendations.

Strain your paint: Use a paint strainer to remove any clumps or debris from your paint before pouring it into the sprayer. This will help prevent clogs in the spray tip, which can cause spitting.

Use the correct tip size: Make sure you are using the correct spray tip for the type of paint you are using and the surface you are painting. A tip that is too small can cause spitting and a tip that is too large can cause uneven coverage.

Adjust the pressure: Adjust the pressure on your sprayer to the lowest setting that allows you to achieve the desired spray pattern. Too much pressure can cause spitting.

Clean your sprayer regularly: Clean your sprayer thoroughly after each use to prevent buildup of paint and debris that can cause spitting. 

Practice good technique: Keep the sprayer at a consistent distance from the surface being painted and move in a smooth, even motion. Avoid stopping and starting or moving too quickly, which can cause spitting.