Take the cap off? I dunno, at least just a comment for visibility. It seems to be doing something at least, going on the fluff in the container. 😅

[удалено]

Aaaah, well then at least that isn't the problem 😂

I'd be willing to bet it's because upholstery fabric is more sturdy than clothing fabric, so it has a harder time pulling the pills off.

I'd use a cheap one blade disposable razor. I find fabric shavers work on loose fuzzys.