I've battled these b@stards for about 4 years. JimmyJ is right - best way to rid yourself is manual removal with tweezers. You can Kalk paste them and this might kill them in one application. I make Kalk paste with really hot Di water, about 1 cup, and 2 or 3 heaping tblsp of Kalk. Goes without saying this will kill anything it touches.
I find you need to spray some paste out of a syringe into the mouth, then stab the body and squirt some more. 1 applications usually works but a second within the week has always killed them for me if the first one didn't finish them off.
Also - about 20 minutes after Kalk pasting them, you can remove them with tweezers much easier as they are weak or whatever.
I've never found any natural control - pepermints, butterfly's nothing works. Racoon's make sense but basically eat anything with soft tasty tissue - so for me that won't work.
Good luck, try to keep your nutrients low and that helps prevent them from reaching plague proportions.
I have also read that liquid calcium works. Take a couple tablespoons of Dow Flake dissolved in a cup of hot water and inject.