If the HP webcam image is blurry, it is advisable to clean the webcam lens with a soft cloth.
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HP Notebook PCs - How to Clean the HP Webcam Lens
Cleaning the HP Webcam
To clean the HP webcam, use a soft, non-abrasive cloth, such as a microfiber screen dusting cloth. You can find a suitable screen-dusting cloth at a computer store. Gently rub the webcam lens with the cloth.