Sticking Backyard Sliding Door

Every summer I have to prepare for outdoor activities and making sure everything runs smoothly from family gatherings to outdoor games but in order to get to the other side I have to go through the backyard sliding door which gets stuck every summer. You have to use every ounce of strength to open it. Now we could get a new one but that would be quite costly but we do have a solution that works every single time and that's using WD-40.
Step 1: Prep area before applying WD40

For sliding doors you want to make sure that the bottom areas are cleaned up you can use some type of brush or a vacuum cleaner to get rid of all the debri that may have gotten stuck where the door slides. Dirt and more gets caught in there. Now that might help a little but you want to make sure that the metal parts at the bottom are not grinding so that's why we use WD-40 to make sure everything moves nice and smooth.