I have 22 wooden double hung windows in my house built in 2024. At the top of the wooden frame a plastic bar with a sweep for the upper/outer window helps to seal the outer window. It is seated between the 2 windows when both are fully up. On all but 2 the sweep is worn off, and I am looking for it. I will send more pictures shortly. Any help with the manufacturer and where to get them will be helpful. You have already provided me with the balance shoes and bulb insulators.
Thanks
John