DM-15L Display

[GerryS]

Okay, a new question. I purchased a DM15L a while back (S/N 20384) which has a blemish in the extreme right side of the display. When I enter all zeros, the extreme right digit appears to be underneath the blemish so it doesn't affect the displaying of digits. When I first contacted Swiss Micros about this, it was suggested to put the calculator into a warm oven for a while and the blemish would disappear.

Obviously, I haven't done it because putting a plastic and metal calculator in an oven goes against my better judgement. So has anyone else had this issue and did putting the DM15L in a warm oven fix the issue? If yes, then what temperature and for how long?

Thank you for your help,
Gerry