Glass is best cleaned in warm soapy (Dawn) water OR with some rubbing alcohol and a microfiber cloth. Solder can be polished back to a shine with the finest grade of steel wool, a magic eraser sponge, or silver/car polish. Wash hands after touching as solder does contain a small amoount of lead. Please hang up with an eye-hook or nail. I have found suction cups to be unreliable (use at your own risk and check often should you decide to use one).