Does the bad smell only come from the dishwasher (ie only when you open the dish washer). Or does it come from the general area of the dishwasher? If it’s the latter it may be from a faulty air admittance valve allowing sewer gas to enter your home. Another possibility could be the p-trap is being sucked dry due to improper plumbing , which might suggest you need an air admittance valve. Just a thought!
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