Hi, I have an established potted jasmine plant that I bring indoors every winter. It accumulates these white bugs every winter. When I bring the plant outside, the bugs don't go away even with washing/rain. My other indoor plants have the bugs too, but they are mostly on the top of the jasmine leaves. What are they and how do I get rid of them? I've noticed them for years now and had tried neem oil spray last summer. It didn't seem to work.