I had my first (and hopefully last) escape yesterday. Apparently Yiggie pushed one of the corners of the tub lid up and headed out - no farther than the next room, fortunately. I put her back in tonight and placed some large binder clips in that corner, along with others spaced around the cage. Wouldn't you know it - the snake pushed up the lid corner so that it came out of both binder clips before I stopped her. She is now sitting in her travel tub inside the regular cage, so she'll stay put while I figure out what to do.
I'm wondering if I need a new "lock" - e.g. luggage straps - or a new enclosure entirely. What do you think?