Shower time
If it's a single stem plant you can give it a nice shower! I wrapped the pot in a sturdy garbage bag gathering the top and twisting until it was tight against the bark. Then I taped it down firmly to the top of the pot (not to the stem itself). I put the plant in the shower and ran a warmish water for a while. I turned it and shook it around. The pot still got saturated but the dirt stayed in the pot!