To get your Invisalign white again, follow these steps:
1. Brush your aligners daily with a soft toothbrush and non-abrasive toothpaste.
2. Soak them in a denture cleaner or Invisalign cleaning crystals regularly.
3. Avoid smoking, drinking coffee, or consuming foods that can stain your aligners.
4. Rinse them thoroughly before placing them back in your mouth.
5. Consult your orthodontist if you notice persistent discoloration.