Glad you found it, I did have to tighten mine once also. I think they way it folds up and I am constantly folding and unfolding morning and evening, several days a week, they may tend to loosen a little. I check all the bolts and screws every 6 or 8 times I go out. They have always been tight except once. Coulda not been tightened down from the factory too. However mine didn't make noise when I moved in it.