If you wash lead crystal glasses in the dishwasher, it will soon develop a bloom. The bloom is very difficult to remove, so always wash them by hand.
Before starting washing up, removing rings from your fingers as they can scratch the glass, especially the rings with diamond.

• Wash lead crystal glasses in warm water with a bit washing up liquid.
• Do not hold the glasses to tight as it may cause cracks especially the area around the rim
• Add a splash of vinegar to a bowl of plain water, and use the mixture to rinse the glasses
• Put glasses on a clean tea towel to drain
• Use microfiber cloths to polish the glasses
• Try not to hold the stem and twist the glass as it may cause breakage