state-reset-redux-persist.js

const rootReducer = (state, action) => {
    if (action.type === USER_LOGGED_OUT) {
        // for all keys defined in your persistConfig(s)
        storage.removeItem('persist:root')
        // storage.removeItem('persist:otherKey')

        state = undefined;
    }
    return appReducer(state, action);
};