Too Much Foam in the Dishwasher
If you see foam residue in your dishwasher or, in severe cases, foam oozes out of the door seal, you should turn off the appliance as soon as possible.
The cause of over-foaming is not a fault with the appliance itself, it is generally caused by human error by using a non-dishwasher detergent. If you use gel caps for both your dishwasher and washing machine, there is a chance that you could pick up the wrong gel cap in error.
Another cause for too much foam is that when you have filled the rinse aid dispenser, you may inadvertently poured too quickly, allowing excess rinse aid to flow out into the base of the dishwasher itself. This can cause too much foam.
What to do next
After turning off your dishwasher, allow at least an hour to let the foam die down then you should remove all your crockery and cutlery and run a rinse only programme. If you still see foam after this, re-run the rinse only programme to check if that clears all the foam. If not, you may need to seek professional help to return your dishwasher to its normal condition.
Once all the foam has been removed, refill and restart the appliance with your normal programme and double-check that you are using the correct dishwasher detergent.
Of course, you may not have made a mistake and used the incorrect detergent or even spilt the rinse aid, it maybe that you have stored your detergent in an area which may have allowed the packaging to become damp, or stale, overtime. This can have a poor effect on your detergent so it may be worth checking if this is the case. The best thing you can do is to discard all the old product and replace with all new detergent and keep it in an area where it won’t get damp or be left too long.
It may also be a good idea to keep your dishwashing detergent in a separate place to your washing machine detergent, just in case.