We regret the unfortunate experience you have had with your glasses. The reason why your glasses have apparently contracted glass plague is difficult to determine, as they are dishwasher safe if indicated on the packing/product care. It is still uncertain why some glasses contract glass plague and others do not. Glass plague occurs both on expensive and cheap glass.
Glass plague typically occurs when glasses are washed in a dishwasher, where they are exposed to an alkaline effect from the soap in the washing liquid. Soap for dishwashers is typically less gentle than ordinary washing liquids, and the exposure time is longer, which are both factors that can cause the glass mass to crystallize.
To minimize the risk of glass plague we recommend:
• Correct dosage of soap and rinse liquids
• Wash at a temperature below 55 degrees
• Use as short programs as possible
• Open the dishwasher as soon as the program has finished, to let the steam evaporate
• Leave the glass "open" in the cupboard/shelf, to let steam/moisture evaporate
You can soak your glasses in citric acid or vinegar overnight. If the white coatings come off, it is a matter of lime coating, and your dishwasher must be dosed differently. If it does not come off, it is a matter of glass plague, and we will of course exchange your glasses.
In the latter case, we ask you to contact the retailer where the glasses were purchased, or alternatively the nearest dealer.
Please bring your receipt as documentation that your glasses are within the 2-year warranty period provided by Rosendahl Design Group A/S.
Older glasses that are continuously dishwashed will over time tend to turn matte and worn. This is normal wear and tear and is not considered an approved claim.