You don’t need this, just get some scrubby brushes that go in your drill. The soft ones probably for tile.

It’s fun, but I rarely bring them out. But cheap and easy to store.

While you’re on Amazon buying them get yourself a car interior detailing brush for baseboards, window tracks, etc. You’re welcome.

I got this one.

https://www.amazon.com/gp/product/B09GBBRJN8/

I generally don't like tools that have one purpose, but this one saves me time when cleaning our showers.

I don't think it's a "must have" because it really only does one thing (just with different shaped brushes).

I've been sucked into the "satisfying cleaning" videos and want to get an electric tile and grout cleaner. There are a billion on Amazon. Do you have one you like (or don't recommend)? Thanks!