Product Warnings (Toy)Keep Upright: Do not tilt or invert the gun too much so that the mechanism works properly and fluid does not leak. Preventing Clogging: After use, wiping the foam residue on the end with a damp cloth will prevent the holes from clogging the next time you use it. Fluid Contact: Be careful not to get water or solution into the battery bed. If the solution runs out: When the bottle is empty, you can use spare solutions sold in grocery stores or prepare a special mixture at home.