What should I do with my indoor only cats during the cleaning process?

We clean a lot of different homes with all kinds of pets including cats.  In a lot of these homes the cats are indoor pets only.  We always notify the home owner of the fact that the door will be open a crack during set up and cleaning.  The LAST thing we want is for your animal to escape.  The opening itself is big enough for the cat to slip out through if it wanted to.  Typically we ask the owner to put the cat/cats in a room that they can shut them in during the cleaning process.  This way we are both comfortable and there will be no problems during the cleaning process, or after!  We love animals just as much as you do so we want to keep them safe!