How to restore window blinds?
We have a set of custom window blinds in our living room. Last day my son was playing with blinds like keeping them closing and open. I don't know what happened, when I went to make them close the rod that rotates them seems to have become stiffer, with some "humps" that were not there before. I tried as much as I can but I wasn't able to keep them completely close. Moreover, I'm scared to try forcing them to close because that might break the mechanism. This blind is almost twenty years old. Do they simply reach the end of their life cycle? Is there anything I can do to restore them to their previous non-problematic functionality? Does anyone here can help me find out a solution? If so, it would be a great help to me.