Do oven door liners commonly need replacing? The first time I used the "self clean" setting on this oven, the strip of padding around the oven door ... puffed out?  Heat leaks out ever since, even to the point where the oven light will sometimes pop on with the door closed.  I bought an oven thermometer, and if I wedge the door closed with a drawer, it seems to hold the correct temperature.

Is it simple &amp; common to replace that liner? Or am I overreacting and there's nothing really wrong with the drawer method?  I'll admit, it IS handy to be able to blame the gimpy oven door any time a baking project doesn't turn out quite right.  ;)
I have never known anyone to replace them. Not me, not my mother (who used hers every other day almost). So no, that does not seem to be a normal thing. Contact the store!