Originally Posted by hobo
Before I started using metal stays, I ironed with the stays in and never had any melt. That's bullshit.
I'm not sure I appreciate being called a liar, but thank you for your comment.
All I can say is that I have had plastic stays soften hugely on ironing and stick to the cotton. I call that melting, but I suppose technically it doesn't become a liquid...
The reason I ended up having to iron over the stays in the collar rather than take them out was precisely because the stays were stuck in the shirt after forgetting them in on washing and tumble-drying the shirt.
FWIW, I also iron on the underside of the collar, as Manton surmises above.