Palo Santo
The Palo Santo, or "Sacred Grove", in the Native American tradition, was used by the healers during fumigation rituals to get rid of negative energies and in order to optimize healing both in terms of physical and spiritual.
Use
Light a stick and let it burn. for one minute while blowing on the flame so that the wood catches fire and smokes. shake it to extinguish the flame and walk through the space you're in to clean the energy. Finally, place Palo Santo stick in a container then let it finish burning. One stick can be used several times times.