As seen in my video, the stair started to wiggle after I installed it one month later. There is a crack on the upper frame shown in the video. I am not sure if thats the reason. The crack appeared when I installed the screw attaching to the bed frame. But I believe I followed the instruction all the way. The slide side has no problem. So I believe its the quality of the wood. Not sure if its safe and normal that other people may have encountered such situation before as well. But I do hope someone could see my post and give me some idea how to fix it since we just passed the return window and its too time consuming to uninstall and return.
Good until one month later
As seen in my video, the stair started to wiggle after I installed it one month later. There is a crack on the upper frame shown in the video. I am not sure if thats the reason. The crack appeared when I installed the screw attaching to the bed frame. But I believe I followed the instruction all the way. The slide side has no problem. So I believe its the quality of the wood. Not sure if its safe and normal that other people may have encountered such situation before as well. But I do hope someone could see my post and give me some idea how to fix it since we just passed the return window and its too time consuming to uninstall and return.