I hear ya brother. When I heat up ribs at home the very same way you did the smoke flavor definitely seems to go bye bye's. When I do catered events and in the position to reheat ribs I will wrap them for an hour or two. If I have a large amount of ribs I still covered them in a disposable pan for an hour or two.
To get that crispy smokey taste back I toss them on the grill with hardwood coals or back into the smoker for 45 mins or so depending on heat.
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