water got inside the lens of my outdoor camera, now the video is all foggy and blurry

Diagnosis

The fogging inside your Google Nest Cam Outdoor Wired is caused by a breach in the hermetic seal that separates the optical lens assembly from the internal electronic chassis. When the silicone gasket or the adhesive bonding the glass dome to the housing degrades, moisture-laden air infiltrates the cavity. Once inside, this moisture condenses on the interior surface of the lens whenever the external temperature drops, creating a "foggy" veil that ruins image clarity and disrupts the camera's ability to focus. This failure is typically triggered by extreme thermal cycling—where the plastic housing expands in summer heat and contracts in winter cold—eventually creating microscopic gaps in the seal. In some installations, if the camera is mounted with the lens pointing slightly upward or without the provided drip loop in the cable, water can migrate along the casing and pool directly against the lens seam, forcing moisture through capillary action. You can confirm this by looking for tiny water droplets clinging to the *inside* of the glass, which cannot be wiped away with a microfiber cloth.

How to Fix It

Because the Nest Cam Outdoor Wired is a sealed unit without user-replaceable gaskets, you cannot simply "re-seal" the lens without risking permanent damage to the internal circuitry. Your primary objective is to recover the hardware via warranty or a professional refurbishment.

1. Document the Failure: Take a high-resolution photo of the camera lens from the side to show the condensation inside the glass. Take a screenshot of the "blurry" live feed from the Google Home app to prove the optical impairment.
2. Perform a Hard Reset: While this won't remove water, it ensures the blur isn't a software focusing glitch. Locate the reset button on the back/bottom of the device, hold it for 10-15 seconds until the status light pulses, and restart the device.
3. External Dehumidification: If the camera is still under warranty, do not open it. Instead, place the unit in a sealed container with 500g of silica gel packets (do not use rice, as dust particles can enter the housing) for 48-72 hours. This may draw out some moisture and temporarily clear the image enough to pass a support diagnostic test.
4. Initiate RMA: Navigate to the Google Store support page. Provide your serial number (found on the back of the device or in the app settings) and upload your photo evidence. Request a Replacement Merchandise Authorization (RMA) specifically citing "Seal Failure/Internal Condensation."

If That Didn't Work

• Chemical Desiccants: If the unit is out of warranty and you are willing to risk the device, carefully remove the outer casing screws. Place a small, high-capacity silica gel bead packet inside the chassis, ensuring it does not touch the image sensor or the ribbon cables, and reassemble. This will absorb residual moisture and prevent further fogging.
• Isopropyl Alcohol Flush: If there is mineral buildup (streaks) on the inside of the lens, you can use a precision cotton swab dipped in 99% Isopropyl Alcohol to clean the interior glass. Be extremely careful not to touch the sensor lens itself, as this can permanently scratch the coating.
• External Shielding: If you receive a replacement unit, install a third-party "camera rain shield" or a small plastic eaves-extension. This prevents direct rain impact on the lens seam and reduces the hydrostatic pressure that causes seals to leak.
• Cable Management Audit: Check your power cable entry point. If water is traveling down the wire into the camera body, apply a generous bead of outdoor-rated clear silicone sealant around the cable entry point and ensure the cable has a significant "drip loop" (a U-shaped dip) before it enters the wall.

Heads Up

• Avoid Heat Guns: Never use a heat gun or hair dryer directly on the lens to "dry out" the fog. Excessive heat can warp the plastic housing and permanently damage the image sensor's calibration.
• Avoid Rice: Do not put your camera in rice. Rice dust is abrasive and can enter the device through the microphone holes, causing permanent hardware failure.
• Check Mounting Angle: Ensure the camera is tilted slightly downward. A lens pointing upward allows rain to pool at the top seam, which is the most common point of seal failure.
• Seal the Hole: When mounting, ensure the hole drilled through your exterior wall is sealed with silicone. Moisture can often enter the camera's rear chassis through the wall mount if the hole isn't properly caulked.