thought i made a spelling mistake, but at least Wikipedia agrees with me.
Winter does bad things to aircraft.
Actually, usually only larger aircraft have deicing capacity. Most private airplanes have none beyond heat for the airspeed probe.
Commercial aircraft carry it only for convenience because the flying rules state that you cannot fly into known icing conditions without it. They take it along so they can more easily make their schedule and not have to fly around stuff.
Finally, I'd like to point out that there are multiple kinds of deicing setups and what you describe is pretty much how the low end stuff works. Most commercial jets just heat the leading edges using high temperature bleed air from the turbines. The rubber boot thing doesn't work so well at high mach numbers...