If you are working with it to heal others, particularly if you work with many people who are challenged by disease, it is a good idea to give your crystal a salt bath every night. As you begin to work with the crystal, trust that you will know what it needs and follow your intuition. In the morning, collect your crystal from its salt bath and brush the salt from it. It will be clean. If it seems as if it has salt residue on it, you can lightly rinse it and again lay it on a soft cloth and allow it to dry in the air.
Some people prefer bottled water for rinsing crystals.
If you are in the city, you may want to consider the use of bottled water for your crystal. The moon cycle Moonlight cleanses and replenishes crystals. Every moon cycle affords a special opportunity for your crystal. Until you get in tune with the cycles of the moon, you may want to mark them on your calendar. On nights when the moon is full or close to full you will want to put your crystals outside under the moonlight.