My brother wears glasses and he needs a visor for football but he doesn't see well without them so he needs a perscription visor.
I don't really have a good answer for this, but I think it is just detecting something that is heavier than plain air. My smoke detectors that are wired into the breaker box do the same thing. I had to disconnect one of them because it went off even when we used the exhaust fan to remove the steam. I bought several battery operated smoke detectors and placed them in the bedrooms and hallways, probably more than is necessary, but the battery operated ones don't go off when we shower, so everyone is happy now..
I would add a flashlight, small sewing kit, a couple of plastic garbage bags, 2 cups, 2 bowls and 2 spoons and a knife.. I don't think it's over kill at all. Those last few items may seem, odd but the garbage bags are useful for laundry. And the cups, well I hate the juice cups at hotels. I'd also add 2 pair of flip flops, having an extra pair of shoes even flip flops is really good. Moist towelettes. and a hand towel or two. Hair brush/comb. disposable razer. Zip lock bags. rubber bands or hair ties. Note pad and pen. Take the pictures and scan them, you can dump then and scans of any documents onto a thumb drive and drop it in there. Yes I have something like this.
