Mites found in moss bark mix!!

[greenpassion]

I have about half my orchids in S/H, and the rest in an orchid mix with spag moss. Recently I discovered tiny dark brown (or black?) mites crawling around the lip of an miniature orchid container that is in S/H!! I was stunned. I thought that the S/H media couldn't sustain insect life... I took the mini phal out of the S/H, cleaned up the few viable roots it has, and put it in fresh moss on a heat mat.
That said, I moved onto discover that I also have them living in the mixes my other phals are in. I sprayed with Safer Soap, as that's all I have here, and really need to know if Safer Soap is even what I need to use. In addition, do I have to repot every one of these orchids? Can I safely saturate the medium with what ever you guys recommend??