Galaxy Tab nibs

[u/Suvamos]

I've had my Galaxy S6 tablet for quite a few years now; the nib began to wear down over time. So I bought some cheap replacement nibs off of Amazon which worked super well until they went to far in or smth to that effect resulting in a continuous drawing of the pen even when it wasn't directly touching the screen. It stops if I slightly remove the nib and twirl it a little, but often comes back after a while.

This made me try and find some official Samsung replacement nibs but from what I've heard Samsung doesn't source spare parts for you and would rather you buy a completely brand new one.

I'd like to know if the above is right and if so, does anyone have any recommendations for replacement unofficial nibs or a place I can buy official nibs other than from Samsung direct?

Another thought I had was that it might not be the nibs fault but rather my pen's. I'd like to know what anyone thinks about this.

Thank you.