I got this great tip from another member on dppreview. It works great, save $$$ and give me joy with this awesome Lumix LX100 again: ... The dust can be easily removed with a vacuum cleaner, just make an adapter with a plastic bottle and while the vacuum cleaner is sucking the air, turn the camera on and zoom in and out several times . The adaptor can be made with a small plastic water bottle, cut both sides, one end will receive the vacuum hose and the other end the lens of the camera, the size must allow the lens to fully extend. If your vacuum cleaner is very strong , set it to low power or cut some holes in the adaptor . Did this procedure sometimes and it works like magic even for sensor dust.