The Original Dry Bag Steak | Make Artisan Dry Age Steak at Home › Forums › Dry Aging Steak › Dry Aging Steak with UMAi Dry® › Umai Dry Age First Time – Large White/Grey Blotch Under Tucked Portion, Ruined? › Umai Dry Age First Time – Large White/Grey Blotch Under Tucked Portion, Ruined?
TheaImpossible to say. Trust your nose.
The membrane is single layer for a reason—That single Larry is the thickness through which the moisture can be wicked away effectively.
If you folded it under, even if it were resting on an open wire rack with excellent airflow, the moisture had to go through three layers, two of which were not in optimal contact with the moist meat surface.
You probably set yourself up for some problems there. That said, there is a distinction between dry aged funk and just plain rotten. If you sniff near the surface of the meat, you should be able to discern whether to proceed or not.