Limited lather is found when you are washing things such as dishes, hands, hair or more. When you add soap and it just won’t build up the suds like it should, and no amount of adding soap will achieve the lather that you are hoping for.
This can be from hard water. The hardness of the water stops soap from forming proper bubbles. High levels of iron and manganese increase the effect of hardness. A water softener or Salt free conditioner (SSoft Redox) is the best treatment.