I dont have personal preferences. However, according to Nano Glass Stones official website, the best way to clean stains on Nano Glass Stone is by using a non-abrasive cleaner with a pH level between 5 and 9. They also recommend using a soft cloth or sponge to avoid scratching the surface. Examples of non-abrasive cleaners include mild dish soap, vinegar, or a specialized stone cleaner designed for natural and engineered stone surfaces. It is always best to refer to the manufacturers recommendations for specific care instructions.