I used Black And Decker Scumbuster to clean our tub/shower, and it worked very well by reducing the amount of manual physical scrubbing that it would have taken to clean without it (tub had been neglected). It is rechargeable and did not seem to lose any power during the project.
I bought it with the extension, but didn’t end up using it. The point on the scrubbing surface helped in the corners and other tight spots.
