No glazing = big drafts!! I took off the old glazing from the downstairs windows and replaced it prior to having the house painted last time. Read a really good tip: keep a little pan of solvent handy, and when you finish with the glazing tool, you can use the solvent to smooooth out any goofs or glitches. It works really well.
Also, Walgreens' has disposable gloves on sale this week, 3 boxes of 50 for $10 :-)
I've got some gloves already.
So what's the best way to remove old glazing without breaking the glass? Wait for it to crumble away? That seems to be working okay for me so far. :)