Any time liquid is spilled inside a system, unplug it immediately. What to do will depend on what kind of liquid was spilled:

Water: Let the system dry for a few days. Do not use any type of heat, such as a hair dryer, to speed up the process, as this may cause damage. If the system does not work properly after waiting for a few days, then a repair is necessary. Because this type of damage is not covered under Nintendo's warranty, there will be a charge for the repair. Please contact Nintendo Consumer Service to discuss options available to you in this regard..

All other types of liquid: Because liquids other than water can damage the internal components of the Wii console, a repair is necessary. Because this type of damage is not covered under Nintendo's warranty, there will be a charge for the repair. Please contact Nintendo Consumer Service to discuss options available to you in this regard..