I also enjoy my blue-illuminated kitchen when I make tea in the early morning hours or late, after sundown. But it's like anything else, it needs to be cleaned out to keep the glass clear. I just boil a little white vinegar with water every so often. Also important is to keep the lid open so that there's no molds that can accumulate around the pour spout and lid recess....just give it a wipe with the vinegar water now and then. Simple.