Winnowing is a time-honored technique used to separate grain from its husks, or more broadly, to distinguish the valuable from the less desirable. This method, rooted in centuries of agricultural practice, has expanded into various other applications.
Many practitioners use sand in their cauldrons as a base for censers or candle holders. By winnowing the sand, one can remove ashes, wax residue, and remnants of incense sticks. It’s best to perform this task on a day with a gentle breeze. Begin by sifting larger debris from the sand using a colander, then transfer the sand into one of two large bowls.
Take both bowls outside, holding the bowl with sand above the empty one, and slowly pour the sand. The light breeze will help carry away ashes and smaller bits of herbs or incense. The clean sand should collect in the second bowl. If the wind is too strong and scatters the sand, bring the bowls closer together or wait for a calmer day. Continue winnowing until the sand is sufficiently clean. With practice and patience, this ritual cleansing can be completed in under a minute.