Zero values can be hidden in pivot tables if the option to show zeros is unchecked. From edit mode, the options button will appear in the upper right hand corner. Select the three vertical dots and uncheck show zeros.
In other types of widgets you can filter results with a value that is not equal to 0.00. From the widget level select the filter button on the value. Then choose the filter type ≠ not equal to 0.00.
If you have any questions please submit a work order with the dashboard attached.