Bad Kirkland diapers?

I just changed my sons diaper since he woke up at 7 and had his bottle. It was linty and the jelly balls were on his butt and penis. He got a diaper change at 3 since he woke up for a bottle and went back to sleep until 7. This has happened before but afraid to use them now.

No size up! 4’s are small and 5’s fit him right.