I've never needed to try it, but I heard Neem Oil works pretty good.

Neem Oil Pest Control without Pesticides | Plant-Care.com
RAINHAZE Reviewed by RAINHAZE on . Need help! First time growing. Hi This everyone, this is my first time asking questions and growing. I had one badge before this one but I totally screw it up. Went into a flowering with spider mites( little bustards ) they attacked my plants pritty hard around 5th week, I sprayed them with Safer Soap, killed them but totally fucked up the plants I think they stopes flowering for few weeks and than bastards came back again right at the end cause my other plants in veggie room were infested as well and I didn't treat them. Rating: 5