To cleanse Crystals, White Sage, Sunlight, and Light from the Full Moon will cleanse the energies that the crystals pick up while being worn.
For best care do not wear stones while in water, there are certain crystals like Tourmaline, Malachite, Selenite, Lepidolite, just to name a few, that will dissolve or chip when exposed to water.
There is a saying that Crystals break once they have served there purpose, so it is possible that over time the Crystals within the wire wrap could break. Some are also more fragile due to the structure of the crystal. So please handle all pendants with care.
See my warrenty page for more details. I am willing to work with you if the crystals due break, depending on the use, and how it broke.