Sure you should. You are still their Sponsor. You don't need to be a know-it-all ....because, obviously they are pretty cluely too, however it is your job to keep in touch with them and be able to help them if they need your help.
There may be areas they have grasped more than you, you can ask for their help in those areas. similarly there may be areas that you shine in and they can ask for your help in those areas.
