If a maid can get to it, so can a burglar
This person had no first-hand burglar experience, but their sister did. Basically, any part of your home that you clean regularly can be a place for burglars to search. Placing valuables underneath pillows or behind various knick-knacks on a bookshelf aren’t smart hiding spots.
Also, if you have professional cleaners come to your home, make sure you keep a close eye on them. If you’re out, get indoor security cameras to keep an eye out on your home when you can’t. Keep track of where they clean and keep your valuable possessions away from those areas. If a maid can get to it, so can a burglar.