Sqealing noise on the X axis

I finally got my 30X30 Longmill MK2 set up after almost a year! I live in Arizona, so it gets very hot in my garage. I finally got a Mini Split installed so I was able to finish setting up. I have a squealing noise when move the x axis when it gets about halfway along the way. That’s either left or right and not in the same spot. I have adjusted the rollers so I can turn them with my fingers. I was going to post a video but it says new subscribers aren’t allowed.