Sliding side windows

[Dafey]

Is there anyway to make the side windows slide easier?
My daughter cant open them , and I have a hard time getting back there to do it. Then when we`re driveing she always wants to open and close them....

 

[lectric80]

I am trying to find a glass shop to replace the felt slide that is in the channel. I think that is the part that wears and no longer allows the windows to slide easily. I haven't found a source for the part yet, so if anyone has any ideas for making these windows slide post up.