How long have you been using it?
My daughters each have Christmas quilts that I made over 20 years ago, they are tied and I used poly batting. The quilts are only washed about 2 -3 times a year. They do not look new but are still going strong.
The fact that your quilt is getting lots of use for me would be great. I like when mine gets used, it means I can make more. My niece had twins 5 years ago, so far I have made each of them 3 quilts. Once when born, then another one because I found an interesting pattern to try for an I-Spy, then the last one was because my nephew found some Star Wars fabric that he wanted his mom to make a blanket for him. His sister is into Disney Princesses so she got that. They aren't sure how I know (their mom sends me pictures of what they like) so are thrilled to get them. I also make them pillow cases to match or for the years I don't do quilts for them. So I don't expect them to last too long, just long enough to make them happy and last as long as their interest in the subject matter.