The glass run channel is a groove that can be found around windows and it is made out of rubber material. The purpose of the window channel is to seal and hold the window in place.
Window channel operationDust and water get into the vehicle due to movement when going over a road bump. So the window parts should be working properly to avoid any debris getting into the cabin's interior. That is when the window channels come into place and keep the window glass in its position, while the window channel balance allows the frame that is holding the glass to operate smoothly.
A common issue with a window channelThe common issue with a window channel is that it is very difficult to clean without a special tool or cleaner.