This sounds like internal condensation. On a fixed-lens compact camera, the safest first step is to dry the whole camera rather than try to open the lens.

Place the camera in a sealed bag or container with a drying agent, ideally silica gel packs. If you don’t have those, dry rice may help. Leave it sealed overnight or longer until the fog clears. A warm, very dry place can also help.

Avoid taking the lens apart unless repair is the only option, since compact cameras are difficult to reassemble cleanly. Also be cautious with hair dryers or direct heat: too much heat can damage the camera or blow dust further inside.

If the fog does not clear after extended drying, the camera may need professional service, because moisture trapped inside can linger or leave residue.