A dead battery is the most common reason why a splat gun might stop working. Try charging the battery and see if it works. However, if the battery appears to be alright, you’ll have to troubleshoot in other ways. Check the inside of the barrel – residues from splat balls can often result in a gunky blockage that stops the Orbeez gun from shooting. However, it could also be due to other, more complex issues like wiring problems or a damaged motor, in which case you may have to get the component replaced or repaired professionally.