Got a sliding glass door. For the last couple of years it has had days where it is almost impossible to open then all the sudden it seems to work fine.

Now Ive noticed that the front bottom edge that closes against the frame is eating into the bottom tray...chewing up metal.

ANybody know if there are replaceable parts on the bottom of the door... wheels or rollers or something....and how exactly do you get the door out and back in.

Yes..I can probably google it....but Id rather ask here where I can possibly ask follow up questions if I get into a bind.