Screen storm door removing plastic window

by Kris
(Deltona FL)

I have a swinging screen door that has a square section screened on the outside and a double hung (up down) sliding window with plastic instead of screen material inside that square section attached from the back of the door.The double hung window seems to be an insert that fits in the square screen door that is held in by screws but when I take the screws out one corner is loose and will push out but the other three sides are stuck. I'm guessing the insert that holds the window in may be glued in some way. Any ideas on how to get that window frame out so I can replace the plastic material?

Quite often storm doors have foam rubber behind the plastic frames that allow you to pull the window to the left or right and get enough space for the window to pop out of the frame.

With old doors this foam rubber gets very hard and brittle and it becomes really difficult to compress it enough to remove the glass

Would be really good if you could post a digital picture because that might give more cluse as to how it comes apart.