I tried this simple hack and was surprised to see that it actually works.

I read somewhere online a few months ago (might have been here) that if placing a small dish of white vinegar in the top rack of your dishwasher can get your dishes extra clean. I always make sure to pre - rinse dishes before I put them in the washer, but there's always some residue left. I tried this twice so far and it really worked.

Just leave a small bowl of white vinegar in top rack of your dishwasher and then run your usual cycle. The vinegar gets distributed throughout the dishwasher and gets rid of that extra residue. You can add as much vinegar as you want since it's all natural and will also help clean the dishwasher itself.