Very few of these extending lens cameras have any sort of weather sealing, but that's a good thing as the sensor can often be cleaned indirectly.
Using a shop vac, and an assistant, hold the shop vac hose tightly around the cameras lens, making sure the hose is large enough to fully cover the lens and not interfere with its operation. Turn on the shop vac, and while its operational, turn the camera on and off several times. This allows the vacuum to suck quite a bit of dust, lint, and other debris out of the camera. It also helps those extending lenses that tend to be a bit sticky at times. I have cleaned many P&S cameras this way over the years and it works about 75% of the time. Better than tossing a camera that is otherwise functional.

My "pocket" camera - used for hiking/biking when I don't want to carry something larger - has developed an arc-shaped shadow in the upper left corner of the photos. I assume it is caused by something on the sensor or the back of the lens. However, the camera is a Panasonic Lumix LF1. The lens can't be removed to allow internal cleaning. Has anybody disassembled a P&S camera and successfully got it to work again? I can see about a dozen small screws that I could remove to start the process. Or should I just live it? Photos are for posting on line, I can't remember ever printing any of them. About 20% of photos have a shadow which is noticeable and can't be fixed in post. Not the end of the world, but I would like to fix the camera or replace it.