As far as I know copper has not a very long half life in the body and does come out of brain on it's own. If you stop exposure the body should be able to detox it without problems. Most copper problems are because some people tend to accumulate more copper than they need. Some can't get rid of it because they have a mercury problem.

You should try to find out what your problem is. If there is no mercury and you don't have an unsually high copper intake it could be genetic. I am not sure what supplements you should take or if diet can help.

If you have mercury, i believe mercury detox can normalise copper levels.