To remove detergent buildup in your dishwasher, run an empty cycle with hot water.
Mid-way through the cycle, add a combination of some vinegar and a bit of lemon juice to the hot water in the bottom of the dishwasher.
To remove any residue, wipe away when the cycle is complete.
*Disclaimer: Alfa Cleaners do not recommend or endorse any particular brand, detergent or cleaning agent. The above is provided for information only. You must determine yourself whether any of the possible cleaning agents are suitable and safe. Alfa Cleaners will not be held responsible for the use or misuse of any of this information.