That's odd as the turntable would need to cope with hot dishes, so must be heat resistant or toughened glass. Glasses tend to go 'grey' and slightly frosty if washed in a dishwasher- presumably due to the alkaline rinse aid? I wonder if the rinse aid also weakens the glass? We did break a turntable in our very first microwave - but I do not remember how ( long before we had a dishwasher so I can't blame that)! Perhaps the simpler models do not use heat resistant glass turntables?
The only thing I can think of is that microwave turntables are made from toughened glass and toughened glass tends to shatter rather than break.
If for any reason it did shatter in the machine, and extremes of temperature can cause shattering, or contact with a sharp object, the minute pieces could get into the workings of the machine or into vessels and utensils unnoticed and washed into the water-course causing any number of problems.
Think of a car windscreen shattering or a double-glazed door or window shattering. At least the breakage is fairly contained but add moving water to tiny shards of glass and it becomes a different problem.
I don’t put mine in the dishwasher either. To be honest, it doesn’t get very dirty usually (but occasionally overflows of food such as porridge if I’m not paying attention). However, a quick wipe with a soapy cloth and rinse is all it normally needs, and for stubborn stains, such as the aforementioned porridge, it goes into the washing up bowl for a thorough clean rather than the dishwasher.
Ive never owned a dishwasher. Not worth it for a single household. I just wash up by hand every 3/4 days when there are enough dishes to warrant it. If I leave them by the sink the cleaner automatically does it and puts them away.
Why not have dishwasher and run that every 5 days or so? Then you could store the dirty pots out of sight.
We’ve never put ours in the dishwasher as it only gets run every 5 days or so. If the microwave turntable needs washing I do it there and then by hand.
I only wash my glass turntable if anything spills on it and always by hand. I always wipe down the inside and turnable after every use. So it's always clean. Mines a Samsung. Only used for cooking my porridge , making hot chocolate and reheating my tea if it's gone cold because I forgot to drink it 🤦.
Maybe because it is a lower price microwave, the glass dish is of an inferior quality. It is possible that the drying stage, where most heat is generated will cause it to crack.
Ive never owned a dishwasher. Not worth it for a single household. I just wash up by hand every 3/4 days when there are enough dishes to warrant it. If I leave them by the sink the cleaner automatically does it and puts them away.
I ruined silk velvet curtains by machine washing them they ended up in shreds. Mind you they were over 100 years old and very dirty. don't give me a job in antique conservation
I have always put them in the dishwasher, it only takes one complaint for companies to change policies so maybe someone’s broke in a dishwasher once.
Bit off subject but I have had a dress for about 5 years which I wash 40% in the washing machine, recently looked at the label to see what the fabric was and saw it was dry clean only.
I’ve never put mine in the dishwasher and never would. I don’t put wineglasses in,either, though I do put ordinary ones in. I would have thought the glass would deteriorate over time if you do.
An interesting question. I've just Googled and they say to clean the glass turntable in the dishwasher. Mine sometimes go in, at others they are handwashed. I'm intrigued as to why your handbook says not to use the dishwasher. Is there a UK telephone number so you can ask customer services?
At the weekend I bought a new microwave, a very basic one as it is used for melting/ reheating etc. I don’t need an all singing/ dancing one. I got the instruction book out last night and was very surprised to read that the glass plate/ turntable was only to be washed in warm water and never in the dishwasher. I have used a microwave many years and have always put this in the dishwasher with no adverse effect. Did you know this , do you do it and do you know why this should be?