Diagnosis
While these cameras are weather-resistant (IP65 or IP66 rated), the seal around the dome can sometimes fail or get compromised if it wasn't snapped shut perfectly during installation or after cleaning. The trapped moisture is condensing on the inside of the lens.
How to Fix It
It's likely not ruined, but you need to dry it out and reseal it. 1) Carefully detach the camera from its mount and bring it inside. 2) Unscrew or unclip the clear front dome from the main camera body. 3) Let both pieces sit in a dry, warm room (not with direct heat like a hair dryer) for 24 hours to fully evaporate all moisture. 4) Before reassembling, inspect the rubber gasket that runs around the edge of the dome or body. Make sure it's seated perfectly in its groove and is free of dirt, debris, or twists. 5) Snap or screw the dome back on very firmly until you hear a consistent seal click all the way around.
If That Didn't Work
If the fogging returns or you see actual water droplets inside again, the seal is permanently compromised. You'll need to contact Lorex support for a replacement dome assembly or gasket kit under warranty if applicable.
Heads Up
When reinstalling the camera outdoors, make sure the cable connection port at the back is pointing downwards, not upwards, so any water that runs down the cable drips away from the port, not into it.