Indoor Window Shutters

I have the internal wooden shutters. Some of the blades stick and not move or move with difficulty. Ideas?
In addition, sone of the metal piece that attaches little blade of the stick is broken. How can I fix this?

Please do not use soap wax is good ..... .... soap works at first but then made the wood swell and increase your problem

To take off the slats using a little dishwashing liquid. To secure the slats finishing nails through the frame by the end of the slat. If you have an electric drill, the better to drill a hole for the nail to go through the frame.

rubbung try a bar of soap or candle on the edges