Treadmill makes horrible noise when in use

Hi all, I got this treadmill a couple months ago. Last week it started making noise as I was running on it, so I stopped and lubricated it. That seemed to resolve the problem until today, when all of a sudden it is louder than ever and it doesn't feel safe to run on something making so much noise.

Could you help me figure out the issue? Im assuming it doesn't need more lubricant because I just did that but have no other ideas.