One of my first hobbies was bonsai.
From that I recall some pests are really susceptible to soap water.
You could try that.
You just need a sprayer and liquid dish soap.
No harm in trying. ..
And would cost almost nothing.
The ground looks like it could use a dry out. How big is the plant? How high will it be able to grow? You may be able to cut a few of the lower leaves to help with airflow.