My window unit is spraying water and making a loud clicking noise

You could have a stoppped up drain passage from the evap coil to the outside of the unit. OR it could be leaning too far inward not allowing the condesate to drain out. Check to make sure the unit is level, and if it is, then pull it out and clean it out. you can use a water hose, but be careful not to get the electronics wet. The passage is usually plastic or styrafoam an at the backside of the evap(inside)coil.