It should pump out the water at the end of the main wash cycle and in doing so get rid of the detergent before refilling for the rinse cycle. Maybe the drainage pump or outlet hose is partially blocked so it's not completely clearing the 'old' water before re-filling for the rinse. Any other signs such as food residue left on the crockery which might indicate this is a possible cause ? Other suggestions - are you using a rinse aid ?
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local