the paper bag dry is for a quick-dry and not part of the cure...the 4 days of air drying before starting the cure should have made them plenty dry to start curing and finish the drying very slow over several weeks or more by opening the lid several times/day and gently stirring, resealing (but not a tight lid) after 20 minutes or so. tupperware type bins work great for larger amounts.

are they brittle and crumbly now?