Months ago, I used a glue stick for the panelsI used Elmer's school glue for another solar ovenI did not use 50/50 water and Elmer's school glueThe aluminum foil on the panels that I used the glue stick for, it made a wrinkle pattern like bricks fitting together.Why did the foil get wrinkles after I smoothed out all the wrinkles on all the panels after the glue dried? The panels that I used 2 different glues on (one glue for each panel) got wrinkles.