I discovered the secret soon after trying to strip the paint off in place... They are very easy to remove. First, remove the stops using a putty knife. Then, and here is the trick, on the sash itself there are 2 screws on the front face. These screws hold the metal bead in place. The screws can be found about 2 inches from the top and the bottom of the sash. If you have heavily painted windows you may have to dig the paint out of the screws. Remove the 2 screws for one side. Now you need to slide the metal bead out. I did this by raising the sash and placing my putty knife under the sash so when I closed the sash it would slide the bead out when window is lowered. Then I grabbed the bead w/ pliers and pulled it the rest of the way out the top of the sash. One the bead is out the window will very easily pull right out. Good luck..

Correction.. there are 4 screws per sash.. but you only need to remove 2 on one side to remove the sash...

sail2relax1,

Thanks for the info on silentite sash removal. I got the lower sash out OK, but am having trouble with the top one. I have located the screws that hold in the track, but the sash is also held in place by 2 pieces that run vertically in front of it. I am un able to remove these. Any advice?

Those are the parting strips. They are easily removed, held in by a single nail.. and probably a lot of paint.

Some styles have side pins attached directly to the glass frame. If you have these, you will need to slide the clips to the center and do not pull the glass towards you.First you have to slide the sash frame up to align it's pin with the cut-out on the storm window frame. Once aligned, pull the sash towards you, tilt a little bit and it will be out.