I keep seeing all these nice enclosures with clear glass and very little if any spots on them. Mine on the other hand although they start out nice start to look "foggy" after a couple days and no matter what I do I cant keep the water spots off the glass. I was using tap water then switched to spring water which helped a little. Are you guys using distilled to mist the enclosures and in the water bowls? I dont have the luxory of being able to use a water softener,etc. Thanks.