Homemade Dishwasher Detergent

I'm always looking for ways to save money.  I coupon, I bargain shop, I cook healthy foods at home and I try to make as much stuff myself as I can...  Like this dishwasher detergent.  It's crazy easy, not to mention super cheap.  And it works fantastic.  You'll never want to go back to using the chemical filled, overpriced store bought stuff again.

Dishwasher Detergent

1 1/4 cup Borax
1 1/4 cup washing soda
1/4 cup salt
2/3 cup lemon juice

Mix all ingredients, add more borax and washing soda if mixture is too wet.  Pack into ice cube trays and let dry (preferably in sun) for 8 hours.