So no hot water in a glass carboy?
Nope, not recommended. Nothing more than warm.
Never heard that before. I've gotten rid of all my glass, but I'm pretty sure I used hot water in them for years. Maybe not HOT, but hot enough.
With Better Bottles I definitely don't use hot water.
As far as cleaning, I've never used PBW. I use Oxi Clean and unscented dishwasher detergent (Cascade or generic). Sometimes together, sometimes not. A good soak with either removes everything.