How to Replace a Toilet Brush

I usually just like, let it flush itself out. And it's on a cord. What if you have someone going in the bathroom right after you? That's why I said that's the only reason why I do that. So how often are you supposed to replace them? Like, is it like a toothbrush every couple weeks? I mean, like, I try to hang on to mine. It's probably why I don't like the poop particles in them because yeah, like I just told you the idea of things like sitting in like landfills where I can't just bring that to Goodwill exactly. The plastic, I want to like, pull onto it.