Pardon me while I get the smell of bleach out of my nose. I hate bleach and I try to avoid using it, but one bottle a year isn't really that much, I suppose, considering.
But I digress. In between my bleach-fest in the bathroom, I revitalized my vinyl shower curtain instead of throwing its nasty-ass away and getting a new one. It's so funny how we just discard those and get new ones when they get gross. Which they do. Often. Since I really can't stand the smell of bleach and bleach-based mildew cleaning products, my shower curtain suffers.
You don't have to replace them all the time. That's a lot of plastic waste. Just toss it in the washing machine. This can be done multiple times with the same curtain before it really just wears out. Toss it in on gentle cycle with white vinegar. That will also be great to ... er ... well, for lack of a better term, douche your washing machine too. It'll come out a little wrinkly but nice and clean and ready to go.
It doesn't matter that they are cheap to replace. It isn't a big deal if they don't look as crisp right afterwards. What matters is it's clean and functional and you didn't toss something.
These aren't getting recycled, no one reuses them, they just go. Let's have them go a little less frequently. And before someone blathers that it's a waste of water, think about the waste of resources that went into making it from scratch, and shut up.