You will need to get:

Soft strip washer for scrubbing
Blade for scraping, but make sure it is new so that it does not scratch
Piece of fine steel wool
Super concentrated window-cleaning solution (1/4 vinegar, ½ teaspoon liquid soap like Joy, or Dawn and two cups of water)
Spray bottle for the window cleaning solution
Different sized squeegees
Dry lint free towel
Cover for the floor in front of the sliding glass door.
Streak free ammonia based cleaner for finishing
Dish detergent for your screen
Gloves for your hands

1. Start by making sure the area around the sliding glass door is clear. Also lay down the protection for the floor.
2. Put on your gloves
3. If there are any type of stickers, tape etc, simply use the blade, to scrape the majority of those off. Do this in a flat push motion. Do not scrape the blade back and forth.
4. If there is a screen on any part of the sliding glass door, you will want to see if this can be moved, or taken off temporarily. Mark one bottom corner of the screen, to know which side you will be putting in where. The best type of writing utensil to use is a pencil since it will not bleed with the water.
5. Take the screen to a place that you can clean it with some fresh water. Use caution not to rip the screen.
6. Use a little dish detergent to remove any dirt from the screen.
7. Now you can spray the cleaning solution you made, on the window. Let this sit for about thirty seconds.
8. Then starting at the top of the window use the soft strip washer to bring the water down. This way all of the dirt is going to the bottom of the glass.
9. If there are spots that do not come off, use your squeegee or cloth with a little extra cleaner to remove the spot.
10. After this entire sliding glass door has been cleaned, you can use the ammonia based cleaner and the dry lint free cloth to wash off any additional particles.
11. Complete this process on all sides of the sliding glass door.
12. Then you will want to make sure to wipe up the floor around the sliding glass door.
13. Finally you will want to put the screen back in. Make sure the screen is clean and dry before doing so, because the dirt, webs etc will simply make the door dirty again.

Following these steps will make it easier to clean your sliding glass door more efficiently. Therefore creating a longer lasting screen door and a better looking home. There are several good products used for cleaning windows and sliding glass doors. Overall though, this combination of cleaning supplies, and solutions is the best way to make your sliding glass door the cleanest.