possibly the start of mold caused by LOTS OF LOW TEMPERATURE WASHES ,to late if mold has eaten into the rubber, do what the makers call a service wash 90+ no clothes and bleach in the drawer to kill the gunge (monthly)
wipe the door gasket after washing completed leave the door OPEN a little (inch will do) along with the soap drawer to allow air to flow through the machine.
wirecutterman, February 2008