Bamboo Toothbrush. Biodegradable : Unlike plastic toothbrushes that can take up to 500 years to decompose, bamboo toothbrushes are 100% biodegradable. How to Care for Your Bamboo Toothbrush. • Replace every 3-4 months : Like any toothbrush, it’s best to replace your bamboo toothbrushevery 3-4 months or when the bristles start to fray.
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