While you can stick with a standard scrub brush, electric spin brushes can help you clean faster, easier, and more effectively. Right now, Amazon is selling this $130 Eyefeat Electric Spin Scrubber ...

"life-changing" Khelfer Electric Spin Scrubber, along with my ... the large flat brush for the shower walls and floors. I was done with the entire bathroom in less than 30 minutes, without ever ...