Sixto, I would get a new one quick, fast, and in a hurry. I experienced the same thing of sticking and then one day I couldn't even turn it from "locked". Good thing I had it at home with a spare car to drive. I rigged a tool from coathanger wire of the right diameter, came out no problem, but you do have to have a slight angle on the ends to slide the cylinder locks away. BTW, I took the whole thing, steering lock assy, out of the dash and did it on my coffee table, after dismantling the ign lock tumbler by tumbler, the main wiring plug on the back of the switch is/was locked in place and would ONLY come unplugged when unlocked. Another theft deterrent item. You will get a new key with the new cylinder after the dealer verifies that you own the car, tag receipt should be enough. Hope this helps you from having the "nightmare" that I had.

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1991 300SE (my ride, 279,000 miles, looks almost new
1954 Cadillac (21 yo son's car, he bought when age 15)
1972 SeaBird 19 ft runabout (old but solid, slant six, Volvo sterndrive perfect condition, undergoing complete overhaul and refit)
1998 Toyota Rav4 (my sons daily driver when he is in the Continental US, PROUDLY serving in US Navy)