It’s very easy. First, all methods rely on your mindful intention that this object is being cleansed, then, you only have to direct that energy to do the cleansing. Don’t just go through the motions, nothing will happen without you willing it so.
My preferred method, use swordfingers:
- Place the object on the Earth
- with your other hand put your first and 2nd finger together and curl the others, this is called swordfingers.
- Set your intention that this object is being cleansed
- Point from top down and visualise or know that your cleansing intention is flowing through the object, washing away any unwanted energy. You may spontaneously see black specks flowing into the ground.
- Keep doing it until you feel you’re done.
Other methods: put it in a bowl and leave it you under a full moon to cleanse, also done for crystals often
If it can get wet without damage, rinse it under clean water that runs into the ground
Or get incense and hold it in the smoke to cleanse it.