Unscrew the Wagner 935 paint sprayer paint container lid. Pour any remaining paint back into the paint can.
Fill the paint container on the Wagner 935 paint sprayer half full of paint thinner. Screw the lid back on. Slosh the Wagner 935 paint sprayer back and forth for a minute.
Turn on the Wagner 935 paint sprayer. Spray out all the paint thinner into the waste bucket. Open the paint container on the Wagner 935 paint sprayer and fill it with water. Put the lid back on and spray out all the water into the waste bucket.
Take the paint container lid off the Wagner 935 paint sprayer. Unscrew the filter located before the hose exit hole. Scrub the filter with the toothbrush and pour some paint thinner on it to help remove paint.
Dip the nozzle head on the sprayer handle in paint thinner. Brush the tip with the toothbrush.
Wipe the Wagner 935 paint sprayer dry with rags. Put the Wagner 935 paint sprayer back together and store it in a cool, dry place.