Hi. I'm Smitty. I am a professional appliance repair consultant here to help you diagnose, and repair, your appliance.
There are door shims that you can install to fix the problem. They are available from your local appliance parts retailers or on line from http://appliancepartspros.com
Please see the pages below for the instructions to install the shims, and inspect the slide rails.
Please let me know if you need anything else. If not please select a positive rating at this time. It will not close your question and you may ask all the follow up questions you like after rating my service.
Thanks Smithy! I'll give that a try. Have a great day.