[Richard]

Guy,

It may not be the felt. My windows were pretty sticky because the bottom track that the window slides on, and the track that carries the weight of the window, was not allowing the window to slide. I used very long zip ties, cut them to length, and slide them between the bottom track and the bottom of the window. Slicked them up with a little dry silicone, and the windows aren’t nearly as tough to move. The grooved part of the zip tie faces down.