kiya from self edge on jeans
http://httpthecrosbypressjackthreadscom20130104
i have to agree with his main point. jeans are tough and you dont have to be so caught up over how you take care of them. if they're dirty, wash em. if they're not, then dont.
i dont like to wash every 2 months but i have washed them gently before about 3 months apart (spilled on them). i just put them on the hand wash setting in my washer then hang dry em.