There is a known issue where certain enhancements (clickies) which are limited to a certain number of uses per day, do not recharge when resting.

This is caused by an old enhancement clickie still in your toolbar, when users have retrained the same enhancement under the new system.

To fix this, simply remove the old clickie from your toolbar (by dragging it out of the toolbar and then letting go of your mouse button), open the enhancement panel, (hotkey: "C", then click "Enhancements" tab) and drag the new version of the same enhancement to the toolbar. The new enhancement clickie will perform properly.