Blurry iPhone photos often come from more than a smudged lens, but that is the first thing to rule out. The article recommends removing the case and wiping the lens with a microfiber cloth, using a very light dab of distilled water on the cloth for stubborn marks. Avoid tissue paper or a shirt, which can make the problem worse.
Lighting is another major factor. Low light makes autofocus less reliable, often forces slower shutter speeds, and can add noise, all of which leave images looking soft or blocky. On iPhone 11 and newer, Night Mode can automatically brighten low-light shots. Users can also lock focus by tapping and holding the screen until the AE/AF LOCK prompt appears, preventing the camera from shifting focus.
For finer control, third-party apps such as Camera+ let users adjust shutter speed and ISO, which can reduce motion blur and visible noise. A tripod is also recommended for keeping the iPhone steady during longer exposures, especially in low light, so small movements do not turn into visible blur.