OK, what's the deal with epoxy and cold? I mean my 90min exopy still isn't hard after 25 hours and my 5 minute exopy is still soft after 2 hours! It's not freezing here but it's cold enough in the house to see my breath. I'm concerned whether the exopy is ever going to harden - and am I going to have to wait until summer.

Could one of you from the colder climes clue me in?

PS. Most Japanese homes do not have central air -- instead we use electric carpets!