How do I know when to change the response system?

Hi all,

I am new to the modern yo-yo and I was wondering when I should change out the response system in my yo-yo’s. I have two CLYW’s with flowable silicone. A mini star, a Hectic and two one drops a dingo and a y factor. Are there signs of wear that I should be looking for? Thanks.

I check for two things:
if the pad/ flowable seems really worn out at the part close to the bearing, almost like a hill that gets to its lowest point at the area next to the bearing

if the binds always slip

-If or when the response falls out.
-When binds get slippy.
-When you can no longer get the yoyo to return.