Several times over the past few months, glasses have come out of my dishwasher sliced into two pieces. The cut is always smooth, and I don't find any glass shards left over. This only happens with glasses--mugs, plates, etc, are entirely unharmed. What might be causing this? [more inside]
The windows in my flat do a lousy job of keeping heat in and cold out. Is there a way to improve the insulating properties of window glass without installing double glazing? Ideally it would be something I could install myself (and if necessary remove when I move out of my rented flat.) Googling turned up various window films, both do-it-yourself and have-somebody-do-it-for-you. Any experience with these or similar products? Any other suggestions?