A systemic pesticide is really the only thing thats going to get rid of it since scale can hide in little nooks and crannies where you'll never find them.

A lot of people love Merit (chem: imadicloprid) for getting rid of scale. What did it for me was Bayer Advanced Rose & Flower Insect Killer that I purchased from Lowes. Its a systemic foliar spray that contains the active ingredients imadicloprid (same active ingredient as Merit) and b-cyfluthrin. I tried insecticidal soap but it just wasn't doing anything so I moved on to this and after about 4 consistent applications, from what I can tell it has been pretty much completely wiped out.

Good luck!

Sorry I haven't been back. My PC crashed and lost all of my favs. The scale finally killed my orchids, or rather depleted them to the point where they gave up the ghost.
I cleaned the area thoroughly, and decided to wait before trying any more orchids, and put an aloe in that spot (kitchen window). I have never been very successful with aloes, so it's another challenge. Plus, I have E-tint windows, which are not necessarily good for plants. The aloe has been relatively happy, has little shoots....but now there is brown scale.
AAArrrgghhh! I spayed with oils, soaps, did the alcohol swab method on the orchids....
I hate using chemicals, We have parrots, and I can't use poisons in the house.
I have a huge Lipstick plant hanging above, maybe he's harboring the little _____s? (evil creeps) I also have a small bonsai ficus in that window, a very happy pitcher plant, some other succulents and my first successful cactus. (Uh-oh, I just jinxed it!)
Is there any hope?

Here is a link that might be useful: {{gwi:194845}}