I don’t know if you can tell by the photo, but the fabric keeps sagging every 2-3 stitches. I’m new to embroidery so I bought kind of cheap hoops that don’t seem to grip the fabric well. (I’ve already broken one by trying to tighten it more). Are there better hoops out there that don’t do this, or is it just a downside to embroidery that I didn’t know about?