Thanks for the advice, but unfortunately i couldn't repair it though i tried several times. I noticed that other than on the other switches, the spring in this key seems to be a little bent to the side. Could that cause the problem? You could say the spring "looks to the side".
I might as well leave the switch alone, since its only F11, a key i use very rarely. I dont want to destroy the switch entirely since it works fine, only lacks the klack...