TIP: How to Clean your Camera Sensor
When you see spots and other artifacts on images, it's often caused by dust or smudges on your camera's optics. Gently clean your lenses & filters with a professional cleaning kit when necessary. Basic cleaning kits with a manual air blower, soft lens brush, solution and wipes can be purchased at minimal cost from Amazon, etc... I do not recommend using compressed gas (air in a can). The propellant can damage sensitive equipment.
If you still see spots on images, you may need to clean the camera sensor. This YouTube video explains how to do it yourself safely.

