How to bathe yourself and rub your back flexibly and cleanly?

When we use a long bath towel, the pull ring will rotate. When we try to rub our backs with a bath towel, the pull ring often turns, which makes us have to stop to straighten the pull ring and then drag it to rub our backs. In the past, I used to use a long bath towel at home. I often wiped the tab once and straightened it four or five times. I often need to hold the pull ring to make the whole process awkward, so it took me a while to return to the bending back rubbing method I invented! Now, I have found a back rubbing tool that I think is good and I am trying it out. We all call it a scrub brush, and it looks like this: