Many times when they are installed the spring is not wound tight enough. The was a fellow forum member that had to tighten his up some more by giving it 8 more turns on the spring. His was the Dometic toppers so other brands may be different. On Dometic toppers there is a spring on each end.
Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989, seasonal since 2000
Car Shredder Op/Tech, Scrap Metal Recycling - retired
I deserve hazard pay when camping with my relatives.