It’s not recommended. There’s not going to be a heat problem or warping issue, but it’s just not going to clean it properly. The biggest issue is that using the dishwasher and then leaving it overnight can cause rusting on your metal mesh net, which renders it useless and wastes your money. Not to mention, coffee grease is stubborn as can be and requires some elbow grease in order to actually remove from your cafetiere properly.\r