K11 clutch problem

Hi everyone, I have a small problem but over time it begins to show itself more and more evident :( In practice, on my k11 I have the clutch that sticks when I push the pedal fully, enough to make it move from a standstill with the gear engaged and to make it difficult to change gear. The problem, however, occurs only towards the end of the stroke, at about half of the pedal it works normally. Any ideas to solve the problem? Ps. a few months ago, shortly after taking it, I let go of the clutch lever a little to lower the pedal that detached high ... but I don't think it hits, even because if it were more tight the problem should be even more evident ...
Thanks to who will answer and sorry for my english (i'm using g translate 😅)