Very easy maintenance of bamboo charcoal and reusable for up to 2 years! Most air fresheners, apart from being ineffective, hold not more than 30 days. BUDDYCARE® – BAMBOO place once a month for about 1 hour in the sun. The UV rays from the sun to clean the pores of the bamboo charcoal, so that they are once again ready to absorb the odors. After about two years as an air purifier, the bamboo charcoal is a wonderful addition to your garden. Just cut the BUDDYCARE® – BAMBOO bag and sprinkle the bamboo charcoal into the soil, where it continues to the plants helps absorb and store this moisture and nutrients. This completes the entire life cycle of a product that comes from the earth and is finally returned to the earth again. So a 100% natural cycle and 100% sustainable.