Dirt, dust, and grime can make your car look and feel gross, but this hack is here to save the day. Here's what you'll need: get a bottle of Elmer's glue and a small jar of Tide detergent. Mix both of the ingredients in the cup holder, and watch as the mixture turns into a solid yet squishy blob. Once it's like that, you can rub it all over the hard-to-reach places in your car. It will pick up dirt, dust, and more.