Double kitchen sink has a foul odor coming from it drains slow and tends to be worse when washing machine is used i have tried bleach and enzyme cleaners any suggestions?

It certainly sounds like it is not draining properly. If it has always been this way, then you could guess that the original plumbing/piping design is faulty. However, if this problem has been getting worse over time, you'll need to call in a plumber. There may be a blockage somewhere along the line, or tree roots have grown into the sewer.