Perfect for cleaning condensation that builds up on windows due to temperature differentials between the ocean and your vessel's controlled environment. You just place them inside the windows, not outside.

Also, Dazzler has a great power, she was just too stupid to ever use it effectively (at least in her original incarnation). The ability to convert sound into light? Pair with Banshee, and you have a perfectly sustainable, extremely high power laser. And that's a simple use. Heck, she's practically Captain America's shield (sounds are vibrations, after all, so nullifying vibratory energy is certainly something she can do), and that's just her defense. Explosives typically work via overpressure waves, which means that she could probably absorb/redirect those as well. The term "bomb-pumped laser" comes to mind.