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For months this ficus tree has been losing its leaves, and getting a sticky sap all over the floor and surrounding area. There may have been mites on it, my mother has been spraying it with Insecticidal Soap about 3 times a month the past few months. She waters it about once a week and it gets lot of light from the big window it's next to.With the weather warming up we've just put it outside for the season.

Wondering what can be done to help heal this plant back to its healthiest state.