Nope, we had them in Utah, too. But have you tried just rinsing the plants off with the hose every day for a few days? I have not had a single spider mite this year either. Just hosing off the plants regularly seems to break the life cycle. Got to be better for the plant than stripping off all the leaves in the middle of summer?
Here's an article on it:
http://garden.org/ideas/view/R...
