A lot of people probably wont like this answer but,
After being at war with spider mites in three grow rooms for 4 months I finnaly found the cure for my problem.
Floramite and Avid , you should be able to find small quantities of either of those miticides on Ebay. Thats where I bought mine.
Floramite is great but Avid is really awesome because you dont have to spray both the top and bottom of the leaves. So if you miss some it will still work. Avid is (translaminar?){not positive on spelling}, which basically means it will soak into and through the leaves.
I treated first with Avid and then 1 Week later I retreated everything with Floramite. Not 1 mite surived. I now treat all my mothers and clones with Floramite and Avid on a rotation, as both Floramite and Avid protect for about 30 days. I did not treat my plants that were within 30 days of harvest. I just sprayed them down with pyrethrin to keep the mites numbers down. Once I got those plants close to harvest out of the room my battle with the mites was over. Everything that had been treated with Avid and Floramite was 100% mite free.
My problem was I couldnt shut down my operation to completley clean and Bomb areas. If I could have I doubt I wouldve had to use such strong miticides.
Before Floramite and Avid, i tried Pyrethrin, Pyrethrin Foggers, Neem Oil, No-Pest Strips, Nicotine, Azamax, and 3 frag grenades(jk) and the mites would come back with a vengence.