I usually don't wash my jeans for at least a month, that's why u get at least 4 or 5 pairs, so you end up only wearing them a few times a month.
Now I've heard you should only wash jeans with jeans, although i don't really bother, and yes inside out, Cold water obviously.
I don't wear my designer jeans when I know i'll get them ridiculously dirty, to work (kitchen) I wear some black AE jeans, since i need to wear long pants.
Tide2go stinks like shit and cologne/febreeze doesn't even cover it up