December 15, 2011
Thanks for posting, Alan! The first thing you will want to do is remove the sash. Raise the sash a few inches, tilt it in towards you, and twist the sash to release it from the pivot shoes. Now, with a flat tip screw driver and hammer, knock out the top guide by placing the screw driver behind the the guide and tapping it out from the sash end.
You say the sashes are tight in the frame, so with the sash out, wipe the inner track clean and then give it a spray of silicone. I would also look at the track and see if there is an adjusting screw located between the top and bottom sash. If there is, turn the screw counter clock wise to loosen the jamb channel of the window.
I hope this helps you! If you have any other questions, feel free to ask and I would be happy to help.