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I am sorry to hear you are having trouble with your appliance.
Hopefully, we can get this resolved quickly.
Use a clean dry cloth and wipe the seal as much as you can, make sure there is not gunk on the seal.
After the cleaning is done, use 2 cups of vinegar (1 in drawer and 1 in drum).
Select an empty wash cycle on its hottest setting.
Let it complete and then wait for around 1 hour before opening the door.
Clean the drain pump filter located at the bottom front of appliance and clean the drum and door seal.
This should remove the stains however, if the problem is still there you will have to replace the door seal.
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