How to clear popup user storage

[GregoryBologna]

I have a custom popup for when a map is not available in ArcGIS. Each time the map is loaded in this situation, the popup opens. The popup is closed on popup.watch("visible", function (newVal). As part of the customization, I am removing the popup pointer class since there is nothing to point at. I handle this by adding a class "map-not-found-popup" and look for it in the watched event.

The trouble I am having is that each time the popup opens, a new user storage is added. How do I stop or clear it?

          popup.watch("visible", function (newVal) {

            var nomap = $('.map-not-found-popup');

            if(newVal) {    // open

              // remove popup pointer if map not found

              if(nomap && nomap.length>0) {

                $('.esri-popup__pointer').addClass('d-none');

              }             

              // other handling

              closeExpandedWidgets();

            } else {    // closed

              // remove popup from dom when closed

              if(nomap && nomap.length>0) {

                popup.clear();

              }

              // reset popup properties

              setPopupDefaultProperties();

            }

          }); // end popup.watch