I have noticed that most of my Polish friends don't have a clue what it is! Can you get it here? Not that I need it, just curious...
Do any of them have cars?
What you call de-icer is a big name (and high price) for a couple of recipes konwn for decades.
- 3 parts vinegar to 1 part water and placed in a spray bottle, this will prevent ice from forming.
- for homemade window de-icer, use a solution of 1 part water to 2 parts rubbing alcohol. This can be isopropyl alcohol which is usually 70%, or methyl hydrate (aka methanol) often sold in 99.9% concentration. Add a few drops of dishwasher detergent and you got yourself some great de-icer. MH is deadly and can be also absorbed through skin so caution is advised.
Methyl hydrate was used by Warsaw Pact for deicing their vehicle windshields and visors in tanks.