Macbook Air Magsafe 1 charging port burning out repeatedly

I have been consistently having problems with my Macbook Air Purchased in Dec 2012 (Model A1369)

Following is the sequence of problems I have faced :

• Magsafe 1 charger pins burned out (2 years ago), thrown away charger
• charging port pins burned out and replaced I/O board from ifixit.com (1 year ago)
• Purchased 2 Magsafe 1 chargers (1 year ago)
• Now both the new chargers pins have burned out.

I am faced with a decision to either buy another charger (for about 90$) or buy a new non apple laptop altogether (I have seen the magsafe connector heating issue on many people's laptops). Because this is really affecting my ability to use my laptop while being on the move. Everything else in my Macbook Air is working great and I am very happy with everything else. It is just this charging problem that is frustrating me. I have to wiggle the port and try different combinations to get the green light to come. Even if the green light comes on, charging may or may not start until the orange light comes on.

Question : If I keep the burned out charging port as it is, and just replace the charger, will it also burn out the new charger ? Or do I have to again replace both the charger and the I/O board ? Is there something fundamentally wrong with the Magsafe 1 charger that it burns out the contacts ? Because a friend of mine has a newer Macbook pro and the same problem happened with him and the contacts are burned out but the laptop still charges (though the magsafe port gets really HOT)

So I am currently left with 3 burned chargers and 2 burned out I/O boards. Do I take the decision to replace the I/O board again and also buy new chargers. How do I avoid the connectors getting burned out again ?

My theory is that is due to very high humidity.

It is 84% in Mumbai, Maharashtra, India right now!

Humidity can form conductive film between the pins that lead to continuous eddy currents.

So how does that apply to your situation?

Magsafe is a magnet (strong magnet). There is always a lot of microscopic particle attracted and magnetized. Normally that would not do anything, but with high humidity it dissolves the micro particles in the water droplets and allows them to flow between Positive and Negative pools of the plug, thus leading to burn marks.

Make sure your Magsafe plug is dry, and only charge it in low humidity environment. Use Compressed Air can and frequently blow dry the magsafe.

Also put can put your Mac in a fridge YES fridge (not freezer) and charge it there.