This is how you clean your camera sensor and lenses by yourself
How to Clean Your Photography Gear and Keep it in Good Shape
Cleaning your DSLR Camera | New Girl in Toon
Camkix Lens and Screen Cleaning Kit - 3x cleaning spray 3x microfiber cloth - Perfect to clean the lens of your DSLR and compatible with your GoPro camera, smartphone, tablet, notebook, etc.:
How to Clean Your Camera Lens (With Example Photos) - Pretty Presets for Lightroom
How to Clean Your Camera Lens [Camera Lens Cleaning Guide] - 42West