You should change the blades on an annual basis, this will save you a trip to the parts store on a rainy day. Fill the washer fluid bottle with washer solvent not just water. Radiator Look in through the grill so you can see the radiator. You might need a flashlight to see well enough. What you are looking for is any obstruction of air flow such as bugs or foreign material sucked up while you were going down the road.
Most people clean out their radiator at the car wash.
Be very careful if you do this. The high pressure water can bend the fins on the radiator causing a loss of air flow and an overheating problem. Lights Turn on all the lights including the emergency flashers. You might want a helper to step on the brakes while you check your brake lights. The key may need to be turned on, on some vehicles to do this.