Has your diamond lost its sparkle? Windex window cleaner is a cheap and effective way to bring the shine back into your diamond. It is easy; all you need is a soft bristled toothbrush, some hot water, a soft cloth, and some Windex. Simply spray the Windex onto your piece, giving it an even coat, and let it sit for a few minutes. Lightly scrub with the toothbrush and then rinse with some hot water. Lightly dry with a soft cloth and you are done. Your diamond will sparkle like it is brand new.