Silicone brushes

I was at Walmart and saw basically a scalp massager, usually $10 marked down to $3.

Basically a handle with silicone bristles and they are almost the diameter of a pencil each.

I bought them and was about to show my wife, but decided to take a look first.

When I opened them up the the box says gentle for your scalp.

Let me assure you its not soft.
I put some lotion on my hand and ran it accross a few times and there is no way to use these on someone's feet!

Not sure if anything can make them softer but I don't see how anyone could stand something that rough scraping accross a soft sole!

Ideas? Or toss them?
Well or actually use them as they were intended...

I'd be willing to try it on someone's ticklish feet! But if it were too harsh, I have many other things to use.