Using drain cleaner (sodium hydroxide, NaOH) to clean your dishwasher is not recommended. Sodium hydroxide is a powerful and caustic chemical that can cause damage to your dishwasher's internal components, such as rubber seals, gaskets, and plastic parts. It is designed for clearing clogged drains and is not meant to be used directly inside a dishwasher.
If your dishwasher is leaving detergent residue inside the cups, it is more likely an issue related to the dishwasher's detergent dispenser or the way the detergent is being dispensed during the wash cycle. Here are a few troubleshooting steps you can take to address the issue:
Check the detergent dispenser: Make sure the detergent dispenser is clean and free from any clogs or blockages. Remove any hardened detergent residue and ensure that the dispenser door can open and close properly.
Adjust the detergent amount: Using too much detergent can lead to excess residue. Check the detergent packaging for the recommended amount and adjust accordingly. Experiment with different amounts to find the right balance.
Choose the right detergent: Some dishwasher detergents are more effective than others at dissolving and rinsing away food particles and residue. Consider using a different brand or type of detergent to see if it improves the cleaning performance.
Check water temperature and pressure: Ensure that your dishwasher is receiving hot water at the appropriate temperature (usually around 120°F or 50°C) and that the water pressure is sufficient. Inadequate water temperature or pressure can affect the detergent's performance.
If the problem persists despite these steps, it's advisable to consult the dishwasher's user manual or contact the manufacturer's customer support for further assistance. They will be able to provide specific guidance tailored to your dishwasher model and help you resolve the issue effectively.