Vetrite is glass, so treat it as you would your eyeglasses or television screen: avoid anything that would cause scratches and ruin the aesthetic of the glass. Avoid anything abrasive, such as paper products or brushes with stiff bristles, and avoid harsh cleaning products. Harsh cleaning products can harm the glass as well as the grout used to hold panels together.
It is recommended that you clean panels with a mixture of vinegar and water and a soft cloth. For stubborn stains, you can use a soft bristled brush. Be sure to completely remove any residue left from cleaning to avoid unsightly streaks.