When doing a repot I sometimes need to clear a rootball of dense soil that has worked its way into the rootball and will not come out with a normal spray wash. Can someone recommend a power washer head attachment for a normal garden hose? The only one I found on Amazon that did not require an expensive power washer engine had a lot of negative reviews.

I understand that cleaning a rootball like this risks trauma to the plant, but keeping the roots in the wrong soil also harms the plant, and I am willing to take that risk and learn lessons along the way.