Hopefully we have some appliance repair persons reading this?

On my above referenced dishwasher, which has been maintained/repaired
by Sears for 5+ years (contract finally has run out), it works just
fine. But, some days, after finishing a load and opening the door,
the push-in rubber door seal pulls out.

This seal simply pushes into a channel in the tub and the door presses
against it when closed/locked.

This occurs once or twice a week and is quite a pia. I thought it
might be sticking to the door so I keep that edge of the door clean of
any residue. And both the door and tub are stainless steel.

The rubber molding is similar in appearance to some door weather seals
in that it has a ribbed tongue that pushes into the channel on the
tub. It goes in easily and appears to be evenly inserted up across
and down. It is still quite supple. But again, it pulls out about
50% of the time after a wash cycle.

Any ideas as to how to overcome this? And purchasing a new DW is out
of the question.

TIA all.