New Bonsai owner. I have my bonsai in a southern facing window, in a room that is 60+ degrees. The tree is at least 18 inches away from the window. I have had small fruit flies, flying around my tree/room. The leaves also had a slight white coating on the leaves, which could have been due to misting the leaves with water to keep the humidity up. The tree is also dropping trees. I sprayed the tree using an insecticide two times, once last week and once this week. After spraying, I noticed the leaves were getting yellowish spots in the leaves. (See pictures attached, first picture is the white on the leaves, second is the yellow ish spots)
Is there anything I can do to help this or prevent this from happening? Or is my bonsai sick?