We do this every few months; When your dishwasher doesn't clean well, fix it yourself following these simple steps and avoid the expensive professional service call. A simple cleaning often solves the problem.
Awesome Cleaning Slime 1 tablespoons of white (Elmers) glue. Add about 1 spoon full of water. Mix. Then in another cup put 2 tablespoons of borax and 2 tablespoons of water. Pour the glue solution and the borax solution together and you get slime. Add some food color to the glue first if you want a cool color. Use mold of your choice...shallow plastic container, etc. Can be re-used many times. When it gets filled with the gunk you have been cleaning, throw it out and make some more!!
Inexpensive and Effective Homemade Leather Cleaner Recipe