Last night I was observing the moon. When the moon was completely out of focus I could see these dots on the lit up area. But when the moon was in focus there was nothing and the image was clear (except for atmospheric haze).
The same happened when I moved the scope to Saturn and it was out of focus. Bringing it into focus and the image was clear and when it was out of focus I could see these dots.
Do I need to clean some part of the optics?