NC weakened over time

I'm starting to feel like the NC has gotten a bit "weaker/worse" over time.

I had to replace the ear pads (and the foam inside). I did some digging, and it looks like there are no original spare parts available for this (at least I haven't found them yet)!

I've had these headphones for over six years now, and I gave them a really good cleaning when I replaced the parts. Do you think the long use might have affected the NC function?

I'd love to hear from anyone who's been through something similar and found a solution.

so, it seems that my memory has been playing tricks on me ...

I was able to test the same model and realized that NC is exactly the same here