This video provides information on easy and handy ways to recharge your crystal. It also helps in identifying when the crystal needs cleaning.
Natural ways to clean- Bury them in soil, washing in clear water, and passing them in fire a few times.
Energising ways- Meditating and transferring the breath ( Pran) energy, keeping it in thunderstorms, exposure to direct sunlight and moonlight.
Programming- Praying to the crystal.