Key stuck in my ignition

You can't. You need a professional to get it fixed, might try a locksmith first before you head to the dealership.

It's a KIA, and things break more quickly than with other brands. That sixteen year old key might be worn out and a worn key can cause this. Otherwise, it's a fault in the switch. A locksmith can get the key out and make a replacement. But a dealer is a better bet as he will use the VIN to cut a new key and if it is a broken switch, he can replace the switch and use the same key code.