This is a reusable filter that can be washed and used about 10 times before it accumulates enough dirt and dust to dispose of. I've tried soaking them in detergent and then using a toothbrush to further clean the filters, but they still have to be thrown out after about 10 full cycles. It says WASHABLE but I have no idea how they clean these filters unless someone is using a washing machine. Buy, use, wash and let dry for 3-4 days. Then reuse. Quite easy.
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