TROUBLESHOOTING MOLD OR RUST
While the steps listed above are all that is required under normal circumstances, they may not be enough to combat mold or rust. Troubleshooting these common issues requires a little extra effort.
For mold or mildew, add one cup of bleach to the bottom of the dishwasher and run it for a full cycle. It is important to note that this only works if your dishwasher is not stainless steel. Bleach and stainless steel do not play nicely together, so you should never use bleach to clean a stainless steel appliance. If rust stains are preventing your dishwasher from looking its best, visit a home center and browse the shelves of the appliance department for a product that removes rust from appliances. Sprinkle the product in the bottom of the dishwasher or pour it in the soap cup. Then, run the machine for a full cycle. While this will help for a while, rust stains are generally indicative of a systematic problem, so to address the issue properly, you may want to speak with a plumber about options for fixing the issue at its source.
Do you want to keep your dishwasher neat and tidy between its regular cleanings? There are several things you can do to prevent residue from accumulating. For starters, make sure that your water heater is set to 120 degrees so that your dishwasher has access to plenty of hot water. Since overcrowding can result in poor performance, resist the temptation to stick just one more dish in a full dishwasher. Finally, choose the right cycle for each load. Using a lighter cycle to wash heavily soiled dishes is more likely to result in dishes that aren’t quite clean and extra residue in the dishwasher.