Begin by assembling the letters into the two words. You want the words DIRTY and CLEAN.
Once you have assembled them, turn them over. Add a line of hot glue to the back and add your magnet strip. Just press the strip to the glue and allow it to dry on each word. Cut as needed.
Place the word DIRTY once it's dried on your table. Align the word CLEAN underneath but upside down. (See finished image at the top of this page.) This way when you use it, you can have the word that corresponds with the state of the dishwasher on top
Make a few additional magnet strips and glue them in place to hold the two words together. They will now go from two magnets to one. (Or for extra reinforcement, you can hot glue the words together.)
Once your glue is dry your dishwasher magnet is ready to be used. Just place it on your dishwasher and let it do the talking for you!