This season I've paired early in the morning when I clean (around 7-8 am). Occasionally I'll have a lock around noon, but most of the time I get a lock late that night, or by the next morning. I give my males 48 hours with each girl. If I don't witness a lock, I will pair the male again. If I do see a lock, the male gets a few days off.

I like to spray down my paired snakes the first night if they haven't locked already. I think it helps spread the pheromones around the tub.

Give them time before you move them. More than a few times I've seen a lock happen after 36 hours.

Hope this helps.