Guava is considered sacred to the Tainos as it feeds our ancestors, the buyiri/ bats.
It can be used similarly to Palo Santo or Sage but I find it amplifies our ancestral prayers. It's smell is sweeter and heavier than Palo Santo. It can also be used to add a distinct flavor to your BBQ!
To use Palo Santo or Guava Palo I recommend you open your windows and front door. Then walk from the back of your home to the front. While doing this you can pray, chant, or simply as for the removal of any negative energy, and welcome in good things like abundance, peace, and love.