I've always had serious humidity problems in the winter and can't seem to get it above 55% so I bought an extra water dish and cave to cover it. I heard of others doing this platic bins and a cut out hole. I'm surprised how often they soak in that. Before I set myself up with this, I'd soak them in the tub every other day. I tell my wife I'm taking the kids to the beach and they seem to love it.