There are many reasons to detail a car, but not all of them are purely cosmetic. Proper detailing improves and maintains the health of your car in much the same way as changing the oil and spark plugs. While detailing takes a bit of effort, the benefits to reliability, safety and beauty are all worthwhile. 

Paint Health
Proper cleaning, polishing and waxing greatly extend the life of a car's paint. Your paint protects the metal underneath. If allowed to degrade, rust and corrosion can wreak havoc on your car with potentially devastating results. Trying a reasonably priced detailing package specifically dealing with paint is a good place to start.

Road Salt
Cause of the seasonal snow fall in Ohio, road salt can be one of the best reasons to regularly detail your car. Deposits of salt and mud can build up in wheel wells and under the chassis. Given enough time, these deposits can eat right through your paint, causing damage to the chassis that isn't easily repairable. 
Improved Lighting Ability
Part of proper detailing is making sure your headlights and taillights are clean and free of damage. Even mild deposits of dirt and grime on your lights can cause large reductions of available light, which can be potentially dangerous at night or in harsh weather.

Interior Condition
By regularly cleaning your interior, you get rid of bad odors, protect surfaces from fading and help prevent cracking and discoloration of the dash panels. Not only does this greatly improve resale price, it also adds a great deal of comfort for the driver.

Wheels and Tires
Oils, solvents, brake dust and other chemicals frequently encountered during normal driving can have a negative effect on your wheels and tires. By properly detailing them, you not only keep them looking good, but you also reduce the risks of cracking in the sidewalls or failure of the wheels due to corrosion.

Proper detailing not only helps to keep your car looking great, it helps to keep it running great both inside and out. This not only improves value and safety, but also personal comfort and pride in your car.