Can clay/pottery/earthen vessels be cleansed?

Answer From The Annual Reading Schedule - Week 24 Notes For Leviticus: No (Leviticus 11:33) – they must be broken. Leviticus 15:12 also states a situation where it must be broken, and there may be others. Also, I'd like to bring up the thought that perhaps glass falls in this category also. Glass is made from sand, and also, like earthen vessels made from clay, when dropped can be cracked and broken. So it is more similar to pottery than wood or garments. Wood and garments can soak up water, and are similar in that way, whereas glass and pottery can be broken altogether. So I view glass as falling in the same category.