thanks everyone for the input....I'm going to try the coffee grounds and of course scraping.....I just was thinking (because of Bubbles comment), I repotted my plumeria last year whenever it was outgrowing it's pot. The leaves fell off almost immediately within just a couple of days. I assumed I shocked it. I remembered I used Miracle Grow potting soil and I put it in a ceramic pot.
So, if scales are fall into the soil what is the best soil to use when trying to save what is left?