Swimmer’s ear is usually caused due to excess exposure to water. Water in the ear can usually be removed using a simple technique, and you can also just let the water be and it will eventually dry away. However, you should never try to use a cotton swab to clean the ear as you can end up with a perforated eardrum.
The ear is a very sensitive instrument and you need to keep any sharp or pointed instruments away from the ear. The structure of the outer ear, which is the part that we see outside, is a slightly twisted canal and this ensures some safety. You would have noticed that there is an oily substance here called earwax. In medical circles, this is called Cerumen. This substance is made up non-water soluble that keeps the ear waterproof and from clogging the ears. If water sticks in your ears very easily then that is a sign that there is too little earwax in the ear and your might need to clean your ear of any debris and wash it out with some salicylic acid to jump-start the Cerumen production. This can be done by pouring some olive oil into your ear and rotating the outer ear a bit. Then, drain this out completely and pour some salicylic acid into your ear. This will clear out any old dead skin that is probably absorbing all the new wax being secreted. Drain this fluid out as well and then wash your ear again by using water.
Removing water from the ears can be done using a simple technique of allowing gravity to do its work. All you have to do is to place the offending ear downward until the outer ear is parallel to the ground. In most cases, all you have to do is wait for a while and the water will come flowing down. If the water refuses to budge, then there is chance that water is sticking to your eardrum and the surface adhesion of the water to your eardrum is what is causing it to hold steady. If this is the case, stand up, keep your head in the same position, and make a motion as if you are trying to bang your head to the ground sideways. This will dislodge the water out of the ear. If this method is also not successful after a few attempts then you need to shoot a jet of hot water into your ear, accommodating for comfort, and then try this technique again. If all of these attempts are too tedious, then just aim a hair dryer to your ear and wait for all the water to dry out. This last method should do the trick and you should be rid of your problem. However, the hair dryer should be placed at a safe distance, before it is aimed at the ear.