Open the ribs, rinse, then smell. Trust me, if they are bad you will know it. I normally age 40-50 days on brisket but have had one go bad in that time. Don't know why, but no doubt about it when I opened it.
Smooth Smoke BBQ Team, KCBS CBJ, 2-WSM, Cajun Bandit Conversion, wsm 2880, Smokey Joe Mini wsm, Old Country offset, several kettles.