Charcoal whitening with attachments. Is this OK to do?

Unfortunately any whitening is probably not going to change the color of the attachments. Your best bet is to get your teeth polished with some good pumice. If you want you could try some traditional whitening gel in your aligners, but don't think results will be what you want.

There are whitening gel available that you can use along with invisalign treatment instead of using charcoal. You can consult with your dentist about the teeth whitening gel.

Hi:I would not advise to use charcoal whitening with the attachments.  Combination of whitening mouthwash and whitening toothpaste is the best alternative at this time.Best,Dr. Maddahi