I use hocus pocus from sullivans, spray it right on the jeans, treat with shout or directly with soap like era and wash,
may have to treat more than once, but I figure if it removes it from calves it will work on jeans, so far it has.
Just think what all you that spray all that stuff on all the time, lungs look like. My son probably will get black lung disease but
he says his chew cleans everything up HA (lol)
also try EzAll's It's Gone. I've found it works really well.
I just about ruined a really good shirt at Louisville. I'm not used to using so much paint & after I've put the "It's Gone" in everything you touched was black. I washed the shirt & it all came out but a faint discoloration on the very ends of the sleeves. Kind of glad to go back to no painting rules.