It’s important to take good care of your camera gear, so that’s why you need to clean your camera sensor and lenses on occasion. When you do clean your camera sensor and lenses, you want to make sure you are using the right tools for the job and proceed gently.
In this first video, see how to clean your lens elements to make sure you have nice sharp images:
In this second one, see some techniques for removing dust from inside your camera and on the sensor.
For more information, if you do want to use the kits to clean your sensor, read: How to Clean Your Camera Sensor in 3 Easy Steps