Introduction
If your Nest Cam IQ camera has lost clear viability, you most likely have a cracked camera lens, which Requires replacement.
A functional camera provides a clear view. If you notice poor camera quality or lines when pulling up Nest Cam IQ recordings, consider changing out your camera.
Tools
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            To soften the adhesive holding the camera together, heat up the edges of the glass lens using a heated iOpener on the device. Alternatively, you can use a heat gun to loosen the adhesive. 
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            Leave the iOpener on the glass lens for two minutes. 
 
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            Place a suction cup on the glass lens that you heated up with the iOpener. 
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            Press down on the suction cup to create a seal, and pull up with force to create a separation between the glass lens and the body. 
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            Pull off the glass lens using the suction cup. 
 
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            Carefully disconnect the flat black ribbon cable connecting the metal plate to the LED. 
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            Remove the metal plate. 
 
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            Carefully disconnect the flat black ribbon cable connecting the LED to the motherboard. 
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            Remove the LED cover. 
 
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            Carefully disconnect the flat black ribbon cable connecting the camera to the motherboard. 
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            Remove the camera. 
 
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To reassemble your device, follow these instructions in reverse order.