Be aware that, contrary to what some comments suggest, the product is reusable without problems. Certainly not to the infinite, but I have had to "wash" my keyboard a dozen times until the dough turns greenish yellow (at the time, this is the sign to change). A height of one cleaning per month, I almost held a year with one box!
For the product to work, you must not "rub". Must affix to the surface and press the dough reaches the hard to access and can thus "absorb" the dirt.
In short, all that to say that I recommend this product.
