Remove all dishes from inside of the dishwasher.
Fill an 8-ounce dishwasher-safe glass or cup with distilled white vinegar. Set the cup on the top rack inside the Bosch dishwasher.
Run the dishwasher through a complete normal cycle. If your Bosch dishwasher has a heat boost feature, set it.
Take the cup out of the dishwasher. Scrub along the door, drain, spray arms and the tracks with an old toothbrush dipped in white vinegar. Scrub the bottom and walls of the dishwasher with a sponge and white vinegar.
Run the dishwasher through a rinse cycle to remove the loosened buildup and residue.