How do you get a hairbrush out of a toilet?
If it hasn't been flushed, stick your arm in and pull it out. Make sure you soak it in bleach and wash your hands right away.
Any and all of the items you bring shall be handled separately from your luggage at the security checkpoint. They should be inside of a transparent plastic bag. As for the hairbrush, it depends on the shape. The more round the hairbrush, the better. It should be less than 15 cms and not be made of metal.