I've been dealing with a mite problem for awhile now, and after finding that the oil and alcohol treatments were failing to be as effective as I had hoped, I've been researching more direct means. I came across these two webpages from Raymond Cloyd at the University of Illinois Extension which provided some excellent information on chemical insecticides and miticides. While written in 2004, I'm would consider these must reads before considering chemical miticide usage. A wealth of information, and some do's and donts.
Part One
All Miticides Are Not Created Equal
Part Two
All Miticides Are Not Created Equal