Folks I am upgrading an old ladies Puegeot Rapide. Both brake calipers are dual piviot and both are sticking on the non drive side rim. You can pull them closed with the levers but the non drive side pads do not release. You have to do it manually.Has the spring in the pivots passed it's sell by date or is there a method to upping the tension within the caliper springs. Would I just be safer buying new ones. Any help appreciated.