I know I've seen this problem answered before but it will be quicker for me to ask again than look it up. I used 60 min epoxy to glue a tube in a blank 3 days ago and today the epoxy was still tacky. I was pretty careful to get the mix right and mixed it well....It is cool in my basement where the glue has been curing and it is a bit humid in this part of the world (but not near as bad as Eastern Texas). Any ideas what might be the problem.