Harry Bloomfield wrote:
After serious thinking Pete Zahut wrote :
I reckon if you squirt steam at a double-glazed panel it's gonna
crack, my missus reckons that it should be OK given that there's a
specific tool/instructions to do so. Who's right - cos I don't fancy
paying for a new window!

I would guess that the localised heat would set up stresses in the
glass and that it might well shatter

That's exactly what I was thinking.

Glass doesn't always shatter
straight away. You can drop a glass, pick it up then have it shatter a
week latter untouched, in the cupboard.