How do you fix a digital camera that liquid was spilled on?

One way I know of, if it's just water, is to submerge it in a bucket or bowl of rice. The rice will absorb the water, and draw it out if it got into some cracks. It's a fairly well known home remedy. If there's actual damage to the circuitry or hardware, unless you're very comfortable repairing electronics manually, you might want to think about getting it repaired at a shop, or even a handy friend, if you've got one.