Corn snakes generally do not produce odors if their enclosure is properly maintained by cleaning up waste. To prevent escapes, use an escape-proof reptile cage and secure all latches. Do not leave the cage open unattended. If a snake does escape, place a dead mouse or other prey item in an empty bottle or cage with holes for ventilation to lure the snake back inside, or use loose balls of green painter's tape as traps.

1. Owning A Corn Snake!
The Truth...
Dillon Rasmussen

2. Question 1
Do Corn Snakes Smell Bad?
Corn snakes, a popular choice of snake for beginners, generally do not produce any pungent odors. Of course, if
their tank isn’t regularly maintained the ammonia can build up and cause an unpleasant smell.
“Well I have a ball python and my snakes cage
never smells. In all honesty in comparison to a dog
cat hamster my snake habitat is rather nice and
refreshing change lol. My snake doesn’t smell is
easy to maintain and doesn’t bark or tear up
furniture. Snakes are amazing pets and they do
NOT smell”
Fri Jul 10, 2009 9:44 am ~Carol W
“I’ve never had any problem with odor. I have reptile
carpet in mine. Actually I have 2 that I alternate. Every
time I see where it has used the bathroom I take
everything out put in the clean carpet wash off all the
stuff in the cage and put it back in. Then all I have to
do is wash the dirty carpet in a tub and let it sun dry.
Like I said I’ve never had any problem with odor at all.
Good Luck”
Thu Jul 23, 2009 8:36 am ~IwantPython
http://www.petqs.com/reptile-questions/corn-snakes-smell-long-you-clean-their-tanks-t219.html

3. Question 2
How to Keep Your Pet Snake in its Cage
How Can I Prevent An Escape? Use a cage designed specifically for snakes or other reptiles. These cages
are built to be as escape-proof as possible.
When using a cage designed for reptiles, keep all latches or clasps secured
at all times.
If you use a glass terrarium with a screen or mesh lid,
make sure the lid has clamps to keep it secure. If you can force a crevice or
lift the screen with your finger, the snake can probably do the same with its
head.
Don’t turn your back on an opened cage. “Just for a minute” is all the time
your snake needs to exit the cage and disappear into the house somewhere.
“All snakes are escape artists. It’s not that they are exceptionally smart (like
a parrot that knows how to unlatch its cage). It’s just that snakes don’t need
much of an opening to escape from their cages. And they will explore their
habitats over and over again, looking for such an opening. After all … time is
on their side.
Most snakes are incredibly strong in relation to their body weight, with
muscles down the entire length of their body. That’s why they often end up
escaping from poorly designed cages.
Here’s a general rule regarding escapes. If the head can fit, the whole body
can fit. So all your pet snake needs to escape is a hole or crevice the size of
its head.”
http://www.reptileknowledge.com/news/preventing-snake-escapes-with-cage-security/#ixzz27QIiWLgs

4. Question 3
What To Do If There Is an Escape!
“you can put a nice warm mouse (dead is fine) in an empty liter soda bottle. Poke a
few holes in it to let as much odor out as possible. Place it someplace on the warm
side (again, get those odors out there), disappear yourself, and wait. The snake may
come out for a snack, and stay (the black bottoms of some of the bottles makes a
nice cave-y feeling place) after its eaten. Or, put some prey in a cage; many a snake
has wormed its way between the bars, scarfed up all the prey, and was then too fat to
fit back through. If this happens in the soda bottle, you can always cut it open, or just
put the bottled snake back into its enclosure, and it will come out on its own.”
Another trap is to use tape. I find the safest tape to use is green painters
tape. Pull a long portion of the tape out and jumble it into a loose ball,
then toss these balls next to the walls of the rooms you suspect your
snake may be in. The snake may get jumbled up and stuck in the tape
ball but the next time you check the trap you can usually carefully
remove your snake from the trap by using rubbing alcohol to loosen the
glue.
http://www.anapsid.org/escapedsnake.html