Although I bought it as a countermeasure against contamination by foreign matter, the fragments were easily torn, and the risk of contamination increased. Although it is certain that the dirt falls, it could not be used as a countermeasure against contamination of food factories.
I used a metal scrub, but I was in trouble because metal pieces could be mixed. After changing to my place here, my attitude was reduced and it was good. Burning and stainless steel burning also fall well.