Every practitioner has tools that they prefer to use for their Craft. To make the most of your tools and your energy, you should recharge your ritual items at least once a year. If you happen to have snow in your area at this time, you can include that in your spell. If you do not, you can utilize shaved ice for a similar effect.
Place the tools and/or stones that you wish to recharge in a bowl. Then top them with snow and any herbs you wish to use. Chamomile is a good choice, if you have it handy, as it works to purify. The snow works toward purification and a clean slate, and it will work slowly and steadily as it melts throughout the night under the full moon. Place the bowl on your altar and say:
Lady, may your light illuminate
Leave the items to soak overnight, then remove the next day and pat dry.