[Does so]

"...The ridges increase the surface area to enable easy cleaning of microbes with minimal effort..."

Yup. And when I use all of the surface of my hands, I use the ridges on my feet.

[dila813]

see my other post too. there are two primary purposes.

if you read about non-stick surfaces, the more random the texture on the surface the more effective it is.

[dila813]

Check this article out, this should help

http://www.thenakedscientists.com/HTML/content/interviews/interview/798/