Clear braces are less prone to staining than traditional braces because they are made of ceramic or other tooth-colored materials. However, they are not completely stain-resistant. Over time, clear braces may become discolored or turn yellow if not properly cared for. This discoloration is often due to exposure to certain foods, drinks, and poor oral hygiene. Some of the most common culprits for staining clear braces include coffee, tea, red wine, curry, turmeric, tomato-based sauces, and tobacco. To avoid staining your clear braces, it's best to limit your consumption of these items or brush your teeth shortly after consuming them.damage the underlying healthy tooth structure.