I've also heard of this working from a few other peopleFor a natural remedy that won't kill them or anything else, spray diluted peppermint oil around your yard or in offending areas. Scorpions (and most arachnids) hate the stuff.
That's when you crank up your patience and let mom nature work it out. Of course it will vary from area to area but what happened here was a pretty good example. A scorp or two invading the house every night. Then as near as I could ascertain, they went after each other. About 2 years of battle royal and it's back down to maybe a half dozen to a dozen Heterometrus, usually content to stay in, under, their little section of the detritus layers. Too bad the little Mucronatus came down from the trees for the bugs and just ended up on the menu.It's a delicate balance between having them around and when they get annoying and overabundant.