Proper care is essential to keep your curly clip-in hair extensions looking their best. Here are some tips: 1. Detangle the extensions before and after each use using a wide-toothed comb or a specialized extension brush. 2. Wash the extensions sparingly with a gentle, sulfate-free shampoo and conditioner. Avoid excessive washing to prevent dryness and damage. 3. Let the extensions air dry whenever possible. If you must use heat styling tools, use a heat protectant spray and set them to a low or medium temperature. 4. Store the extensions in a cool, dry place when not in use, preferably in a box or a breathable bag to prevent tangling. 5. Avoid sleeping or swimming with the extensions to prevent damage.