Putting colored glasses in a dishwasher can potentially ruin them, depending on the specific type of glass and the dishwasher's settings. Here are some factors to consider:
Temperature and Heat: Dishwashers use hot water and drying cycles to clean and sanitize dishes. High temperatures can cause colored glasses to undergo thermal stress, which may lead to cracking or breaking. Additionally, some colored glasses may have a special coating or finish that could be damaged by the high temperatures.
Detergents and Chemicals: Dishwasher detergents often contain strong chemicals that can strip away or damage the color or finish of the glass. This could result in faded colors or even discoloration.
Mechanical Action: The dishwasher's mechanical action during the cleaning process could cause colored glassware to chip or scratch, especially if the glasses are in direct contact with other items or the dishwasher's racks.
Quality of the Glass: The quality and durability of the colored glassware can vary. Some glasses may be dishwasher-safe, while others are not designed to withstand the dishwasher's harsh conditions.
To protect your colored glasses, it is best to hand wash them gently with mild dish soap and warm water. Avoid using abrasive sponges or scrubbers that could scratch the surface. If you really want to use the dishwasher, check the manufacturer's instructions or packaging to see if the glasses are labeled as dishwasher-safe. Even if they are dishwasher-safe, consider placing them on the top rack away from the heating element to reduce exposure to heat.
In general, it's safer to hand wash colored glasses to preserve their appearance and extend their lifespan.