We purchased a used trailer this fall and something I did as a first timer, preventive medicine maintenance is I pulled out all the windows and took the air hose and blew out the tracks and seep holes. Something that only took a few minutes and might be a good addition to the annual maintenance list. After I was done the windows opened with ease, no sticking, and I can only imagine just like new.
2012 ST25RB SunSet Trail - RESERVE
Silverado LT Z71