Ray's advice is good. You should also try bringing the slides in just a couple of inches and, while lying on the floor with a flashlight, carefully inspect the skids on your slide which ride on the floor. You may well have brought the slide in while a stone or ??? was on the floor and it could have been imbedded in the skid causing the problem.
Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.
2007 Itasca Ellipse 40FD