Q: I have two sliding doors in my house. They are very heavy and really difficult to move. What’s wrong and how can I fix them? A: Chances are the doors roll on wheels. Remove one door — get some ...

Q: I have a problem with my sliding glass door. To get it to open, I have to practically put my foot against the doorframe and pull with all my might. Please help me save my back. A: I’ll bet that ...