Q: I notice that the paint peels off much too often at the bottom of the side jambs on my front door. I repaint these areas, but a few months later, the paint near the concrete starts to peel. I hate ...

Q: I notice that the paint peels off much too often at the bottom of the side jambs on my front door. I repaint these areas, but a few months later, the paint near the concrete starts to peel. I hate ...

Airbnb properties have a grading problem, hosts and guests say: Most U.S. rentals earn near the top rating of five stars.