Instructions
Check that the Sensor Bar is connected correctly into the back of the Wii console. Place the Sensor Bar in an open area just above or below your television screen. Do not obstruct the Sensor Bar with anything, or the Wii Remote will not be able to communicate with it. Make sure you are not standing too far from the Sensor Bar -- the optimal distance is between three and ten feet.
Check the batteries in the Wii Remote. Take them out and put them into another electrical device to see whether they are fully charged. If they are not, you will need to replace the batteries.
Remove any electrical devices that could be causing the Wii Remote to work erratically. You will want to move objects such as cordless phones and wireless computer keyboards. If you have any infra-red light sources, you will want to move those away as well. Look out for candles, sunlight, fireplaces and stoves.
Turn the Wii Remote upside down, with the buttons facing the ground. Tap the side of the remote with the buttons against your hand. Make sure you do not use too much force.