Window won't roll up all the way

[1966shortwide]

I had the same issue when putting strip's in and new window glass.what I did was take the window off the channel and bevel the edge of the channel both side's front to back full length of channel's.this allow's the channel to spread the strip's apart and no flat edge to catch the strip's. You will have to remove glass from channel to do the taper or you will scratch glass..The bevel start's at top next to glass and taper's down ,You don't have to go down very far,just so long as you have a taper about 1/8 inch or so.I used a flap wheel on a electric angle grinder as it make's a smooth bevel. There will be a slight resistance as your fully roll up window ,but it will go up without catching and knocking.you will have to get new window setting tape to reinstall window into lower channel.when you take window from channel be sure to mark position of glass to channel ,save's guessing where it was setting.This worked for me.