Using this 'Baby Bat on Board' window sign is super easy. First, clean the car window where you want to place the sign to make sure it's free of dust and dirt. Then, press the suction cup firmly against the window to attach the sign securely. You can stick it on any clean, flat part of your car window. As for maintenance, if the sign gets dirty, you can gently wipe it with a soft, damp cloth. Just don't use any harsh chemicals or abrasive materials as they might damage the sign. When not in use, you can remove it from the window and store it in a cool, dry place. Be careful when handling the suction cup to avoid any damage, so you can use the sign again next time you hit the road with your baby bat.