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)