Ice detection light

Hiya guys. :) I've been holding off asking this for awhile now but it has finally annoyed me enough to ask. I searched here but don't see it mentioned by anyone else.

How do you turn off the wing ice detection light? It will go off with the global light key (L) but it never goes off with the switch labeled for it. I can't find any way to just turn that light itself off without using the L key to turn every light off..

Thanks!