No, although this is the case with other double walled glass brewers, the Tornado Duo is the first of its kind. The temperature in most dishwashers is simply not high enough to cause this to happen with the Tornado Duo. The glass would need to be heated to 300 Celsius, then there can be expansion, enough to push out the silicone seal. Regular DishWashing machines are usually 95 to 100 Celsius.Brewista utilizes a Purified Water Washing Process that uses 130-135 Celsius High Temperature Heat to Dry which allows us to QC each unit ahead of time to check the seal.All that being said, although the Tornado Duo is “dishwasher safe” it’s not recommended to use the dishwasher for cleaning.