Water in your ear canal will most often dry up on it's own. Putting a few drops of alcohol in the ear canal may help to speed up this process. Tipping your head sideways and wiggling your ear a bit may also help the water to escape. If you are bothered by water in your ears after swimming, consider getting custom swim plugs from your audiologist.
The heat from the dryer can help evaporate the water inside your ear canal.
Set your blow dryer to its lowest setting.
Hold the hair dryer about a foot away from your ear and move it in a back-and-forth motion.
While tugging down on your earlobe, let the warm air blow into your ear.