M.B.
you probably already have this but baking soda to neutralize the acid will probably be a start. You'll have to do a rinse load, then a wash load.
Rinse load with baking soda instead of soap , then add soap at the beginning of the rinse cycle.
then take it out, and if it still needs work, repeat. You shouldn't have to, but then everyone's different.
then run it through a regular load with other stuff normal soap etc. Or keep it by itself.
Good call washing it cold water.