I just had an "interesting experience" while trying to defrost my 190.
Started it up and while it was warming up, grabbed a can of de icer and sprayed it all over the windows to melt the frozen snow.
While using it I decided it was the shitest de icer I had ever used, as it was having no effect at all.
I then looked closer at the can and discovered it was Liquid snow chains !
I vaguely remember buying a can of this stuff in the summer because it was cheap, and thought it might be interesting to see what it does when we get some snow. Its now going in the bin.
It was all over the windows like very big, very sticky bogeys and took nearly two hours to get off.
Had to use an ice scraper to scrape the thicker lumps off, then rags soaked in petrol to wipe the residue off, then clothes soaked on warm soapy water - then repeat several times.
Shut up STEMO.