-Keep it in beautiful condition for long lasting use-

How to cleanly polish your glass
1. Do not use detergent, while holding the glass by the bottom of the bowl rinse it out.	2. Place it upside-down for some time on a linen tea towel.	3. For a finer sparkle, steam it over boiling water.	4. When polishing use two linen tea towels.
5. First polish the base.	6. Hold the glass lightly in your left hand and polish the inside of the bowl with your right.	7. Caution: Do not hold it by the base while polishing the bowl; twisting the stem could cause it to snap.	8. Raise the glass up to check that no smudges or bluriness remains.

Related page=> Riedel linen tea towel.

Hand Washing

When the surface is oily and dirty, after washing in tepid water rinse it in running water. For that extra sparkle in your glass before polishing steam it over boiling water it will make your very clean. The best way to dry crystal glass is to use old, well worn fabric or linen. (If the cloth has been washed with a fabric conditioner it will leave a light film of grease which kills the bubbles in champagne among other things). When polishing use two hands. Hold the glass lightly in one hand and polish the inside of the bowl with the other. Do not force the cloth into the bowl as the delicate walls of the glass could give way under pressure. Caution: Do not hold it by the base while polishing the bowl; twisting the stem could cause it to snap.

Dishwasher Cleaning

Crystal glasses are used in hotels and restaurants around the world where they are of course cleaned in professional dishwashers. So it should not be a problem for customers when they do this at home. However, there are some potential drawbacks. Often long-stemmed glasses do not fit in the racks. The washing cycle takes around an hour and exposes the glasses for extended periods to hot steam. Moreover, if they are left overnight they will be exposed to an environment of highly concentrated moisture. The result, after many hundreds of cycles, is that the glasses begin to tarnish, showing a light but irreversable blue film. Glasses may also take on a "dishwasher smell" from the chlorine in the water or from any rinse aid that is used.

About the white film or color change due to extended dishwashing and detergents

When you wash your crystal glass i n washing and drying machines, it will gradually develop a blue tint, and if this is repeated for about a year, there will be an overall white film on the glass surface. The whitish build up is 'oxidized zinc' attaching to the components of the crystal that merge with calcium from the detergent that it is washed with, and the white film could ruin the glass surface if the oxidation progresses. The detergent will not adhere to the glass suface but the materials of the glass could regretably be altered depending on the detergent and cycle time when the water temperature is around 70-80 degrees (C). It is gradual, but there is documented research that this development of white film only occurs in the of washing in water hotter than 30 degrees (C).

About white muddiness due to water spots

Generally there is more in water than just hydrogen and oxygen. Calcium, magnesium, silica, and various metals like iron all merge into tap water, and when these metals enter into the washing machine they adhere to glass as a white muddiness that is commonly refered to as 'water spots'. Water spots are not necessarily bad and do little to no harm to the body. However, the white coloration on the glass gives a bad image, and the accumulation of them may begin to stand out. The use of a dishwasher hastens the process. Even using the same water supply there is greater adherence washing in a machine than washing by hand. The reason for this is that (assuming that both water samples contain the same amount of iron) the water is in contact with the glass for a shorter period of time, and the water is dripped out before it is dried. That is to say that the iron that is contained in the water is spread out over a wide area, and the white film is thinned to the point of not being noticeable. In a washing machine the is a short period of time between the rinsing and the drying of the glass, so the iron is more condensed leaving visible water marks. For these reasons there is a significant difference when using hot water and/or a dishwasher. There are various ways to counteract the problem of the white film, but the best way is to wash your glasses by hand, and insert a dishcloth into the glass to dry it. Then after it has been air dried you can polish it. Sometimes businesses use basic bleach on things that have developed water spots. They also use rinse detergent with water softeners or purifiers, but this is not generally an option for everyday home use.