Help with ventilation windows 67 Deville Conv
 

Hi,

I have a 1967 Cadillac Deville Convertible and the small vent windows on each door don't want to close completely. They open and close using the switch but they don't close completely. If I push them in to close them, then the switch cannot open them anymore (and I have to push them out a little before the switch can do the rest).

Does anybody know what's wrong or how I can fix this?

Please let me know,

Thanks.

Jerry