Have an exit plan when the equipment fails. Whenever you throw a Anti/de-icing switch, confirm what you think should happen actually happened. If able, go faster, use the RAM rise to melt the ice. My Father flew a early Sabreliner without any anti/deiceing equipment, they would just go faster. 250 below 10k is a speed limit for normal ops, if able, go 350. Slowing for the approach is another story