Speaking of glass... I got water spots on the outsides of my windows at home. Tried everything. Vinegar, ammonia, bleach, soap, water, rags, scrub brushes, etc. It looks clean when I'm done, but when I got back inside and the sun shines on the glass...there they are. Spots. Someone recommended CLR, but after reading the precautions, I decided I didn't want that stuff in my house. Baby Jessie comes to visit a lot these days.