USB2-Micro-250X doesn't stay in focus

My USB2-Micro-250X will not stay focused. I get it in focus and it
continues to move and it quickly is out of focus. I can hold it in place with my hand, but it makes it difficult to look at things that way.

Thanks for asking!

What resolution do you have the microscope set to? This sounds like the resolution is set to maximum, which would lower your framerate to almost unusable levels for live preview. I’d recommend no higher than 1280x1024 for general use.