I need retaining clips for storm door glass and screen
How do I measure my screen door opening to find retaining clips? I have 2 aluminum screen doors, one of which is white. Both are half doors with screens and storm windows that can be changed out every season. The clips for both doors are missing. How do I measure the channels/opening to find what clips I need? I have bought clips from the hardware store but they are all too thick to fit into the grooves.